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View Full Version : Flying is danagerous - a risk assessment - comments please


Fuji Abound
22nd Nov 2007, 16:15
My question was prompted by comments on PPRuNe along the lines “I wouldn’t do that if I were you because .. .. ..”

I can think of a number of flying “pursuits” we might do which are arguably “safe” with proper training.

GIVEN PROPER TRAINING I was wondering which we thought were inherently more dangerous and why - or if you like, the same question, without proper training.

Here is my list - you can assume in a SEP or multi as you wish.

Aerobatics
Formation flying
Tail wheel flying in and out of farm strips
IMC
IMC at night
Night flying in VMC
Air racing
Gliding of any sort

You can add to the list if you wish.

Troy McClure
22nd Nov 2007, 16:49
Flying's not dangerous. It's crashing you want to worry about. ;)

(Apologies for flippant post - been a long day....)

Chilli Monster
22nd Nov 2007, 17:57
Given the right training and the right equipment I wouldn't describe any of the above list as "dangerous".

The only item there though, where I would consider specific scenario training unnecessary, would be the tail dragging out of fields - you just have to approach it with the right attitude.

Single Spey
22nd Nov 2007, 18:01
Driving to the airfield
Instructing

Zulu Alpha
22nd Nov 2007, 18:12
Display flying is probably the most dangerous, followed by flying in and out of short strips.
Aerobatics is quite safe if done at a good height as evidenced by the British Aerobatics Assoc never having a fatal accident in 30 yrs of aerobatics competions.

Contacttower
22nd Nov 2007, 18:15
IMC at night


Its my perception that it has the potential to be quite dangerous...but that hasn't stopped me flying at night single engined.

I'm probably much more likely to have a smash in a taildragger trying to exit some field than have an engine failure in the night and ending up looking for a dark spot.


Driving to the airfield


I stand to be corrected on this one but actually in the case of GA flying is more dangerous than driving. On average someone dies in a GA accident in the US everyday!

Rod1
22nd Nov 2007, 18:17
I would probably go for night flying. Not at all hard to do, but if things go wrong you are in a big mess.

Rod1

Final 3 Greens
22nd Nov 2007, 18:18
Flying (light aircraft) is statistically dangerous.

However, many will fly hundreds of hours without an incident.

Low probability x high severity event.

Those of us who love it feel that this is okay.

old,not bold
22nd Nov 2007, 18:41
in the case of GA flying is more dangerous than driving. On average someone dies in a GA accident in the US everyday!

Bit of a non-sequitur, don't you think, unless fewer people are killed, each day, driving?

That I would find hard to believe!

Anyway, it's a crude comparison at best; it doesn't compare like with like.

Deaths per year per million occupant/miles would be a better number to know.

Kit d'Rection KG
22nd Nov 2007, 18:49
Deaths per year per million occupant/miles would be a better number to know :ok:

Sadly, the regulators don't gather data on flight hours, landings, numbers on board, or any other statistics needed for this analysis. :eek:

However, there is little doubt that some areas of sport aviation offer risk equivalent to motorcycling without a crash helmet, on a wet road. Others do better. :sad:

None of them approach the levels achieved by commercial air transport operations in large jets, and they should never pretend to do so. Flying school instructors who, when challenged by nervous 'trial lesson students', say, 'you're taking a greater risk driving to the airfield', are lying, pure and simple. :=

Contacttower
22nd Nov 2007, 18:54
Bit of a non-sequitur, don't you think, unless fewer people are killed, each day, driving?



Indeed, but considering the number of planes in the US flying and the number of cars on the road I think you'll find GA flying is more dangerous. As I said though I stand to be corrected with some hard stats.

Chilli Monster
22nd Nov 2007, 19:05
As I said though I stand to be corrected with some hard stats.

YOU made the statement - you back it up ;)

Actually I'll save you the trouble - http://www.meretrix.com/~harry/flying/notes/safetyvsdriving.html.
Does this tell the whole story - who knows?

julian_storey
22nd Nov 2007, 19:13
Everything is dangerous to some extent.

Driving can be dangerous, getting on a train is not without risk, even walking to the shop is slightly dangerous.

It's all about managing risk.

eharding
22nd Nov 2007, 19:34
Crop Dusting...

...At Night...

...In Afghanistan.

Tony Hirst
22nd Nov 2007, 19:46
Tail wheel flying in and out of farm strips
I'm curious as to how farm strips become more dangerous because you are flying a tail wheel aircraft :confused:

DFC
22nd Nov 2007, 20:05
Sleeping is dangerous.

How many people die while sleeping?

Getting out of bed in the morning is full of risk if you want to look for it.

Life without risk could perhaps be called coma if it was not for the risk of not being given some sustinance while in such a state.

Regards,

DFC

julian_storey
22nd Nov 2007, 20:23
Well said my friend! :D

mawse
22nd Nov 2007, 20:38
hazard : flying
definition of hazard : something with the potential to cause harm :eek:

risk : likelyhood of that happening :{
severity rating
hazard 1.no injury
2. minor injury
3. lost time > 3 days illness
4. major injury
5. fatal

likelyhood 1. highly improbable
2. remotely possible
3. occasional occurance
4.fairly frequent occurance
5. regular occurance
6. almost a certainty

risk = likelyhood x severity

make ya decision :ok:

Flyin'Dutch'
22nd Nov 2007, 20:48
I'm sure it doesn't- it's just that taildraggers are more dangerous than nose gear planes in general. Also one is more likely to take a taildragger into a marginal landing strip so there is greater exposure to risk.

Chapter and verse to back that up please?

Contacttower
22nd Nov 2007, 20:57
YOU made the statement - you back it up ;)

Chapter and verse to back that up please?

Yes I know, I'm very lazy :=.

But to be fair since when have assertions needed backing up with hard stats on PPRuNe? ;)

Usually reasonable statements like: Taildraggers are more dangerous than nose gear planes can be taken as correct without the need to look up numbers- if everyone had to do that then very little would get posted here.

ChampChump
22nd Nov 2007, 21:54
taildraggers are more dangerous than nose gear planes in general

Of course, a Cub can just barely kill you, as someone famous once said.

ContactTower please elucidate. I am in danger of needing a RA before walking up to my aeroplane now. Will she explode because there's no wheel at the front? Does the tailwheel trigger a landmine as it trundles along the grass? I'm intrigued.

I think I would refer the OP and all since to what is basic in risk assessments. People make accidents, not the tools and equipment.

Flash0710
22nd Nov 2007, 22:48
"You take a risk getting up in the morning, crossing the street, or sticking your face in a fan!"

Name the film...

xxxx

f

Saab Dastard
22nd Nov 2007, 23:51
Risk is the degree of exposure to both negative events and their probable consequences.

Risk differs from uncertainty in that it can be measured.

Risk is measured in terms of both consequences and likelihood.

It is therefore pretty meaningless in discussion to say that there is a "risk" of death associate with an activity - unless the probability of that outcome is also stated.

Risk assessment is concerned with identifying the hazards associated with an activity, and also assessing the probabilities associated with each hazard - the sum of "hazard x probability" is effectively the overall risk.

From this a strategy of risk management can be implemented to mitigate the effects of the hazards and / or reduce the probabilities to lower the overall risk to an acceptable level, commensurate with the objectives (e.g. to go flying).

It may be that it is not possible to manage the risk to an acceptable level, in which case the sane decision would be not to embark on the endeavour!

Of course, the above is a great simplification of a complex subject! It is rarely easy to quantify all the hazards and associated consequences, let alone to calculate the probabilities. And I have not mentioned categorizing risk according to severity. Yet we do this daily at both conscious and unconscious levels for a wide variety of activities, from crossing the street to deciding whether the weather is suitable to go flying.

SD

BRL
23rd Nov 2007, 06:04
"You take a risk getting up in the morning, crossing the street, or sticking your face in a fan!"

Name the film...

xxxx

f

The Nekkid Gun................

Do I win a pint???????? :D

Contacttower
23rd Nov 2007, 07:29
ContactTower please elucidate. I am in danger of needing a RA before walking up to my aeroplane now. Will she explode because there's no wheel at the front? Does the tailwheel trigger a landmine as it trundles along the grass? I'm intrigued.



It is amazing how easy it is to get misunderstood on this forum...the Cub is indeed a very 'safe' aircraft and believe me I am not a risk averse pilot...at all.

Having said that though as far as the landing and take off phase is concerned one would be a fool to treat the Super Cub like it was the idiot proof PA28. In that sense at least...all other things being equal...taildraggers are more 'dangerous' than nose gear aircraft.

And just so we are clear...if I had my way all light aircraft would be taildraggers. ;)

Droopystop
23rd Nov 2007, 09:03
Attempting to remain VFR with lowering cloud base.

A recent report into flying out to the rigs in the North Sea put the most dangerous part of the trip as the drive to the airport. And they still make everyone wear rubber suits and do the dunker every three years.

Flyin'Dutch'
23rd Nov 2007, 09:11
all other things being equal...taildraggers are more 'dangerous' than nose gear aircraft.

CT,

You're talking rubbish.

The only difference in handling between a nosewheel and tailwheel aeroplane is during taxying, take-off and landing.

With the appropriate skills both are fine.

Insurers do not make any differences in premiums between the two set ups making it fairly obvious that there is no additional risk.

You may have a taildragger in your avatar but if these are the convictions you hold I doubt that you are either very experienced or confident.

What I will grant you is that windwise tailwheel boats are sooner at the handling limits than the comparable nosewheel variants (ie nosewheel vs tailwheel Maule) but there is such a variety in aeroplanes that you can not use that generalisation.

A DC3 in skilled hands can be flown in more adverse conditions than a PA28 by a low houred PPL.

IO540
23rd Nov 2007, 09:59
IMHO ground operations are the most dangerous bit of flying.

I've never had as much as a scare when airborne, but had one or two major mishaps (none my fault) on the ground, plus a load of sticky situations (usually to do with negligent airfield surface maintenance at some of the places I've been to) which luckily did not result in damage.

As for flying itself, one should always have an escape route. Therefore, I avoid SE night flight for long periods because there is no escape route. Other stuff e.g. over water flight is handled by carrying a raft etc. Mountains are OK - fly high above and have a GPS displaying the topo chart so one can glide into a valley if there is an overcast.

Fuji Abound
23rd Nov 2007, 11:13
Night IMC - I recall reading more than once that some of the most demanding of all flying we do is night IMC. If you read the NTSB reports it is indeed noteworthy how many accidents occur at night in IMC. Of course in Europe so little night IMC is flown that the number of accidents are insignificant.

Formation - some would have you believe this accounts for the highest number of accidents. I am not sure whether the evidence supports that assertion. As has been discussed on another thread there are of course variation of formation from flying in very well spaced company, to tactical and close formation.

Tail wheel in to farm strips - I guess I mentioned this one not so much with an eye on the tail wheel in particular, but because it is tail wheel aircraft that are more likely to go into the shortest strips and therefore press the boundaries of what is possible. While usually the accidents aren’t serious, they do seem to account for a fair number. Perhaps that is just because pilots are “pushing” the boundaries, or because conditions are less controlled (usually the strips are un- managed and inevitably grass).

Risk can be managed, although I am not sure how you manage the risk of night flying with one engine. If the engine stops there is a large amount of unmanageable luck involved.

Only a fool doesn’t try and manage the risk (albeit there are plenty of fools around). We might assume that most pilots who fly night IMC have therefore taken what steps they consider necessary to best manage the risk. However the accident rate is high. This might suggest it is one of the most “demanding” forms flying takes. However, on the other hand so is aerobatics, but interestingly the accident rate is very low. I wonder if this is because the pilots manage the risk better or because the risk is inherently less?

FullyFlapped
23rd Nov 2007, 11:41
We might assume that most pilots who fly night IMC have therefore taken what steps they consider necessary to best manage the risk. However the accident rate is high. This might suggest it is one of the most “demanding” forms flying takes.
Umm ... or could this possibly be because, unlike flying aeros etc, there's by and large sweet FA you can do if the donkey stops ?

The more interesting question is why so many people know this and yet still do it (and yes, that includes me, including directly over the North Sea on a few occasions ...) ?

FF :ok:

Fuji Abound
23rd Nov 2007, 12:07
Umm ... or could this possibly be because, unlike flying aeros etc, there's by and large sweet FA you can do if the donkey stops ?

Yes, but that is reason enough for only a very very small percentage of the accidents.

Contacttower
23rd Nov 2007, 13:43
You're talking rubbish.


Insurers do not make any differences in premiums between the two set ups making it fairly obvious that there is no additional risk.



Look I don't want to get into a silly arguement about this...because actually I suspect in reality that our views on taildraggers are pretty much the same. A little while ago a friend of mine started doing his PPL on a Super Cub and on his first solo he ground looped it and damaged it to the point that he had to complete his PPL on the C152.

I don't know about this country...but in the US insurance companies do recognise that taildraggers are more likely to be crashed. I was talking to some US pilot in passing a while ago and he said that due to his low hours he couldn't get insurance for a Husky that he dreamed of buying. Why do you think that schools in the US are so 'funny' about taildraggers? Even if the actual risk is the same, the percieved risk is greater.

I quite agree about the DC-3...but the experience of the pilot is not relevant to what I was saying since I made it clear that I meant 'all things being equal'.

Perhaps what I should have said was 'To the fairly low experience pilot the taildragger is more risky than the nose wheel'. Once the pilot has lots of hours on taildraggers, or if he has always flown taildraggers then the risk difference disappears.

IO540
23rd Nov 2007, 14:47
I don't see why night IMC should be particularly dangerous, if one is a current enough instrument pilot to fly the approaches at the end.

Flying at night is harder work but one needs an autopilot for any serious IFR anyway.

Single Spey
23rd Nov 2007, 14:49
I avoid SE night flight for long periods because there is no escape route.



Ever heard of a parachute (either personal or fitted to the airframe)? Granted it might only be a good idea during daylight.

Fuji Abound
23rd Nov 2007, 14:56
I don't see why night IMC should be particularly dangerous, if one is a current enough instrument pilot to fly the approaches at the end.

Flying at night is harder work but one needs an autopilot for any serious IFR anyway.

Weather is a significant factor perhaps not helped by less ability to avoid it visually.

Approaches that go wrong also seem to be a big factor where the differing visual cues may be relevant.

Shaggy Sheep Driver
23rd Nov 2007, 15:05
Look I don't want to get into a silly arguement about this...because actually I suspect in reality that our views on taildraggers are pretty much the same. A little while ago a friend of mine started doing his PPL on a Super Cub and on his first solo he ground looped it and damaged it to the point that he had to complete his PPL on the C152.

CT, as FD said, you are talking rubbish.

Once your friend is trained to fly taildraggers, he'll find it no more 'dangerous' than nosewheel flying. There is nothing intrinsically more dangerous about a tailwheel aeroplane over a nosewheel one.

Indeed once tailwheel trained, you friend will actually be a safer pilot since, even when flying a nosewheel aircraft, he will hold off correctly because of his tailwheel training. He will thus be far less likely to become one of those several pilots in the AAIB reports each month who break their aircraft's noselegs. Just watch the C172s and PA28s landing at GA fields - many will land on all 3 wheels together, with little or no attempt at a hold off.

Yer tailwheel pilot would never inflict that on an aeroplane.

SSD

Contacttower
23rd Nov 2007, 15:27
Indeed once tailwheel trained, you friend will actually be a safer pilot since, even when flying a nosewheel aircraft, he will hold off correctly because of his tailwheel training. He will thus be far less likely to become one of those several pilots in the AAIB reports each month who break their aircraft's noselegs. Just watch the C172s and PA28s landing at GA fields - many will land on all 3 wheels together, with little or no attempt at a hold off.



I agree completely with all that. But this is my point:

Once airbourne the plane doesn't care where the nose wheel is so from a risk point of view they are the same. But are you seriously telling me that you aren't more likely to be involved in a take-off/landing accident in a taildragger than a nose gear aircraft?

If someone was trying to say: 'Taildraggers are dangerous' then I'd be the first to stand up and correct him...because I don't believe they are and like you said, with proper training they are fine.

But danger and risk are relative terms as well and I think if I asked an instructor: 'Which is more likely to be involved in a landing or take off accident, a nose or tailwheel aircraft?' They would say tailwheel.

Shaggy Sheep Driver
23rd Nov 2007, 15:45
But are you seriously telling me that you aren't more likely to be involved in a take-off/landing accident in a taildragger than a nose gear aircraft?

Yes.

But danger and risk are relative terms as well and I think if I asked an instructor: 'Which is more likely to be involved in a landing or take off accident, a nose or tailwheel aircraft?' They would say tailwheel.

If they did (which they wouldn't) they'd be wrong. I refer you again to all those broken noselegs, props, and shock-loaded engines in the AAIB reports every month.

Contacttower
23rd Nov 2007, 16:28
I refer you again to all those broken noselegs, props, and shock-loaded engines in the AAIB reports every month.

To be fair there are a lot more nose wheel aircraft out there to get broken.

As I said I don't really want an arguement over this...so I'm not going to reassert what I said earlier (because you'll just disagree with me). Instead I'm just going to say what I think...in terms of me i.e. my personal perception of risk when I go flying:

When I go flying in the PA28 I don't really think about landing/taking off too much...after all it's a pretty solid plane...it doesn't pull any tricks and to be fair in good conditions its difficult to mess up the landing if you arrive over the threshold at the right height and speed; power off as you flare, raise the nose a bit, hold and 99/100 the main gear will kiss the ground followed by the nosegear shortly afterwards. Overall in terms of the different risks associated with different parts of the flight take off/landing does not rank very high.

When I go flying in the Super Cub my perception of the risk changes slightly...I'm never worried about running out of runway for example...but the risk associated with take off/landing increases in my mind slightly. When you open up the throttle it's not just 'sit there and wait for the speed to build'; one has to be much more active with the controls. I personally find landing the Super Cub harder than landing a PA28...and in my mind that equates to a greater degree of risk involved in the action.

These aren't the words of someone spreading 'barroom bravado' about taildraggers or someone who flys in fear of what the aircraft might do to them but someone who is slightly in awe of one of the greatest planes ever built and has the sense to treat it with the respect it needs and deserves.

Shaggy Sheep Driver
23rd Nov 2007, 17:46
As I said I don't really want an arguement over this...
Then please stop posting nonsense about something you clearly don't understand. FD told you, I told you.... What bit of "what you posted is plain wrong" don't you understand?

Go get a tailwheel checkout and discover what tosh you are spouting. :rolleyes:

Edit: You say you fly Supercubs. I find that worrying... I'm glad it's not my Supercub.

Contacttower
23rd Nov 2007, 17:56
Go get a tailwheel checkout and discover what tosh you are spouting. :rolleyes:



I have tailwheel check out.


Edit: You say you fly Supercubs. I find that worrying... I'm glad it's not my Supercub.


Look I've said my piece above and I'm not going to change the way I feel...maybe when I've got several thousand hours on tailwheels but for now I will consider tailwheel aircraft harder to land than nosegear aircraft.

ChampChump
23rd Nov 2007, 18:31
I believe the problem of tailwheel insurance in the USA is due in good part to the ever-increasing demise of good, old-school instructors and their ever-twitchier insurance companies. That's what an American, old-school intructor friend told me. There's (allegedly) a proportion of the flying public there that can afford aeroplanes they assume are easy to fly, get a nominal checkout from an hour-building instructor whose experience is severely limited on said aeroplanes, scuttle off to play on the many hard runways over there and....the insurance companies got fed up. Premiums yonder are now well-beyond affordability, especially for the small flight school.
I certainly wouldn't want this unsupported story to reflect on the quality of all hour-building intructors, anywhere, but that's how it was explained to me, when I was lamenting the dearth of rentable taildraggers and it seems credible.

I was taught by said old-school, after getting basics in gliders. I couldn't agree more about the three point landings seen so often: those poor nose-wheels deserve so much better. Tailwheel aeroplanes can be interesting on the ground, but I hope I concentrate just as much in a spamcan. It aint all over until the fat lady's singing, back in the hangar.

DaveW
23rd Nov 2007, 19:11
Um, at the risk of getting my head bitten off (and by SSD of all people - most unlike you), I can see where Contacttower is coming from here.

For example: Groundlooping is an accident mode that is just not considered for nosewheel aircraft, and therefore is an additional risk when dragging your tail.

Other risks are (generally) the same - except nosewheel collapse of course, but that's 99% due to not flaring - a trend which will hurt your bird whatever end the third wheel happens to be.

Contacttower expressed an honest opinion, and defended it more than once reasonably and with grace. I'm more than a little disappointed at the undeserved Prooning he received for it. :=

Contacttower
23rd Nov 2007, 19:33
Contacttower expressed an honest opinion, and defended it more than once reasonably and with grace. I'm more than a little disappointed at the undeserved Prooning he received for it. :=

Thanks DaveW, I really appreciate it when someone backs me up on PPRuNe.


But then a groundloop isn't particularly dangerous - just costly.


Dangerous was the wrong word for me to use, perhaps just 'risky' or 'hazardous' would have been more appropriate.

Shaggy Sheep Driver
23rd Nov 2007, 20:01
Um, at the risk of getting my head bitten off (and by SSD of all people - most unlike you)

To paraphrase 'The Battle of Britain' film.. "Clearly, you don't know me". :E:E:E

I can't let your coment pass, DaveW. CT stated, more than once:

"Tailwheel aeroplanes are more dangerous than nosewheel aeroplanes"

That is plain bunkum and simply inflates the myth that taildarggers are for superheros only. More than one tailwheel experienced Prooner responded similarly to CT's post..

If I see such bunkum stated, I will challenge it. If the perpetrator continues to peddle the rubbish message, I will come on stronger until either he shuts up or I get bored or I am shown to be wrong by someone pointing out that I've missed something (not unknown :) ).

I'm still waiting....

Contacttower
23rd Nov 2007, 20:14
That is plain bunkum and simply inflates the myth that taildarggers are for superheros only.


I've clearly made a complete mess of what I'm trying to say here; I don't think taildraggers are for superheros only at all- hell if I can fly one then anyone can.

But SSD please at least grant me that in the US insurance costs for taildraggers are higher than for their nosewheel alternative which is a direct result of more landing accidents happening involving tailwheel aircraft.


Go get a tailwheel checkout and discover what tosh you are spouting. :rolleyes:

Edit: You say you fly Supercubs. I find that worrying... I'm glad it's not my Supercub.


Oh and by the way I don't appreciate being accused of lying about my flying experience or having it implied that I'm a rubbish pilot.

DaveW
23rd Nov 2007, 21:17
To paraphrase 'The Battle of Britain' film.. "Clearly, you don't know me".


True, but I do know, and respect, your Proone & Flyer personae, hence the surprise. :8


I can't let your coment pass, DaveW. CT stated, more than once:
"Tailwheel aeroplanes are more dangerous than nosewheel aeroplanes"


Did he, though? Contacttower is clearly more than capable of answering for himself, and has generally referred to "risk" rather than "danger", but to save some cut and paste effort:

If someone was trying to say: 'Taildraggers are dangerous' then I'd be the first to stand up and correct him...because I don't believe they are and like you said, with proper training they are fine.


At this point I bow out - my work here is done. :)

Ct, you're welcome.

bigbloke
23rd Nov 2007, 21:37
Hi

I am a student PPL, dont wanna be any more than a PPL but would like an IMC so that flying becomes a more reliable means of transport for business use.

So do folk really consider flying IMC in SEP to be hazardous, does anybody have or know where stats might be found for this.

Some of the earlier posts stated that IMC at night is considered particularly hazardous in SEP aircraft. So do folks geneally think this is slightly more risky than normal or the GA equivalent of russian roulette ?

This isn't a wind up, I just dont want to invest in a qualification if the received wisdom is that I'd have to be crazy to use it :confused:.

Thanks

BB

Gertrude the Wombat
23rd Nov 2007, 22:18
Some of the earlier posts stated that IMC at night is considered particularly hazardous in SEP aircraft. So do folks geneally think this is slightly more risky than normal or the GA equivalent of russian roulette ?

Well, as someone called our cheerfully to us as we walked out onto the tarmac last time, "remember, if the engine stops you die".

But the engine doesn't know it's night time, and it's not going to stop during the day[#], so why should it stop at night?

I've got an IMCR lesson booked for 4pm tomorrow.

[#] Well, probably not, particularly if you're flying with an organisation whose last engine failure (if indeed they've ever had one at all) was so many decades ago that none of the old-timers can remember it ever happening. If the wing falls off you die even in VMC in the daytime - but that's not very likely either.

TheOddOne
23rd Nov 2007, 22:23
So do folk really consider flying IMC in SEP to be hazardous, does anybody have or know where stats might be found for this.

Some of the earlier posts stated that IMC at night is considered particularly hazardous in SEP aircraft. So do folks geneally think this is slightly more risky than normal or the GA equivalent of russian roulette ?


bigbloke,

Here's the received wisdom regarding SEP IMC:

When flying a single-engined a/c, the biggest risk in the cruise is engine failure, 'cos you're going to be on the ground in between 1-2 minutes. If you're VMC during the day and at a reasonable height, then you have a chance of choosing a reasonable landing site, such that you survive. If you're flying IMC, then the inference is that you're at the same height that you would fly VMC if the weather was better, therefore if you have engine failure you're going to glide in cloud to a lower height before you can see to land, reducing your choice of landing site.

Now, at night even if you can see the stars, moon, lit roads etc, then you still can't see a suitable landing site - there's the old saw about a forced landing at night, when close to the ground 'turn on the landing light. If you don't like what you see, turn it off again'. Again, the received wisdom is that if IMC, you're making the situation just that much worse.

Personally, I think that flying SEP at night doesn't FEEL any more risky than during the day, though I'm more careful about weather minima, I don't like being IMC at night, in fact I've always avoided it. What I do, though, is carefully plan the flight to make full use of radio nav-aids and GPS rather than just bimlbe about, as one tends to do during the day. Frequent FREDA checks are also a risk-mitigator. There's no night VFR in the UK, just IFR, in other words, remain 1,000' above any object within 5NM of track, except when landing and taking off.

The IMC rating isn't about blasting off in rotten weather. It's about learning properly the limitations of flying SEP in marginal wx and how to avoid situations beyond your and the a/c's capabilities. In extremis, it's also a get-you-home service if the wx does turn worse than the forecast.

So, yes, PPL SEP can be a useful business tool, provided you always have Plan 'B'. The IMC rating will make you a 'safer' pilot, in my view. Go for it!

Cheers,
TheOddOne

scooter boy
23rd Nov 2007, 22:27
Quite frankly I find the whole concept of formal "Risk Assessment" a pointless exercise in most scenarios. Most of the time we make decisions based on the information available, judgement calls if you like. i:e will the cloudbase at my destination be OK for VFR or should I file IFR? is the aircraft/avionics reliable? will it be dark by my approach time? Am I going to encounter ice?

These decisions all need to be taken in the context of the aircraft, the pilot and the planned route.

Avoiding disaster is all about having some spare capacity, a reserve to dip into if things go bad, one of those reserves being alternative courses of action. Once the reserves get frayed then problems can happen.

Some examples of this:

I flew to work in my R44 this morning knowing that I may have to fly home at night (my finish time is outside my control). Although I am night qualified and current any of you who have flown a helicopter at night will know that it is very different to fixed wing in terms of the inherent instability that helicopters have and that night helicopter flying is far more risky than day. However, having kept an eye on the weather and knowing we would have a clear night with a full moon strong enough to cast shadows, plus having all the significant power cables on the route self-programmed in my GPS database I was prepared to take this extra risk. This resulted in a beautiful flight back across Cornwall just after dusk and no disorientation due to the significant "celestial illumination".

I regularly fly night SEIFR provided we have the equation of current pilot, capable aircraft/avionics and right routing/time - no sweat. However I would not push the boundaries at night in the UK for the simple reason that there are very few available alternatives should the destination suddenly become unavailable. Better to go early the next morning.

A friend of mine is debating whether he will be able to get his Eclipse 500 into a 760m tarmac strip (when the minimum landing roll demonstrated by the test pilot is 700m). Personally I would demand a far greater reserve unless of course the wind was strong and right down the runway. Even so, if it was my Eclipse, scraping the paintwork (or worse) would really make me feel bad.

(Close) Formation flying without proper training can also be very risky. The degree of skill required to hold a close formation is not to be underestimated and losing discipline in close formation can have sudden and rapid consequences.

We all need to retain a healthy respect for our limitations and stay within them.

"I wear my yellow streak like an overcoat, it keeps me safe and warm"

SB

Shaggy Sheep Driver
24th Nov 2007, 00:04
Not so fast, DaveW.... You're not getting away with that.


I can't let your coment pass, DaveW. CT stated, more than once:
"Tailwheel aeroplanes are more dangerous than nosewheel aeroplanes"

Did he, though?
Yes, he said:
it's just that taildraggers are more dangerous than nose gear planes in general.
I rest my case.
I'm now reminded why I don't come on here often. Heck, it's hard work pointing out the bleedin obvious.:bored:

sternone
24th Nov 2007, 03:47
Posts like this always have the meaning to assure the original poster that what he is doing will not kill him.

It doesn't work like that, since most accidents are pilot related you must understand that you have control of your life, be educated and well trained, it will keep you alive.

Having a bloke telling you that statisticly it's very unlikely that you will kill yourself is not a correct perception, it's all about training and pilot proficiency, the rest is bar talk.

Contacttower
24th Nov 2007, 05:41
SSD, I said I didn't want an arguement, but you know what, I've changed my mind.

Despite the fact that I admitted that 'dangerous' was the wrong word to use and also that it was strictly in relative terms and by no means meant to imply that taildraggers were 'dangerous' in absolute terms (if danger in the absolute can ever exist) you seem to insist on picking apart what I said earlier and also what DaveW said in my defence. You then tried to tell me that I clearly didn't know what I was talking about and you implied that I was a bad pilot.

I wouldn't have done this originally (because like I said at the start I'm not a risk averse pilot at all and my absolute perception of risk when flying taildraggers is low compared to night IMC for example) but I think I'll be contacting the NTSB and the AAIB to get some real stats about taildragger accidents.

IO540
24th Nov 2007, 06:39
The IMC rating isn't about blasting off in rotten weather. It's about learning properly the limitations of flying SEP in marginal wx and how to avoid situations beyond your and the a/c's capabilities. In extremis, it's also a get-you-home service if the wx does turn worse than the forecast.
Oh no not that one again !!

The IMCR is a perfectly good privilege which is every bit as good as the full IR, within the rather limited legal privileges for IFR (UK only, no Class A, 1800m+ vis for departure/arrival).

Ultimately, it all depends on how well equipped the plane is and how current you are. Loads of IR holders only just manage to keep their IR renewed with the annual check; are they good current pilots? Of course not.

Kit d'Rection KG
24th Nov 2007, 08:47
The IMCR is a perfectly good privilege which is every bit as good as the full IR

:yuk:

(I'm guessing that you have an IMCR then). :ugh:

Fuji Abound
24th Nov 2007, 08:58
Interesting debate going on amoung the tailwheelers.

Are they inherently more dangerous to land - yes, no, maybe.

I made the observation that because they are capable of getting into short and often more difficult farm strips, some of which are poorly prepared and most of which are unmanaged perhaps some of the ground accidents are caused by those pilots who push the boundaries - in doing so on farm strips of this type there is no margin for error.

Does that account for a perception that they are more accident prone?

Final 3 Greens
24th Nov 2007, 10:34
Fuji

I haven't got the numbers, but if the stats show that more taildraggers have accidents per X hours than nosewheel a/c, then it isnt a perception.

In the same way that if the stats show that C150/2 (for sake of argument) has more nosegear collapses than C172, then that is not a perception either.

However, it is wise to remember that correlation does not prove cause and effect, so direct comparisons are difficult, as usage will impact the stats, so a/c types used heavily for training/low hour pilots might suffer more nosegear problems from being thumped down.

However, we might agree that taildraggers are more challenging to pilots with lower hours on type, but are less risk when operating out of rough strips?

In conclusion, a risk event is contextual so an experienced tailwheel pilot would carry far less risk than me, as I have never flown a taildragger.

Interesting debate though, since perception of risk is usually a stronger driver than stats, for any people.

IO540
24th Nov 2007, 11:07
I have no TW experience but surely there is no doubt that more skill is required especially for a given value of crosswind.

Whether this translates to a greater risk would depend on whether the training apparatus addresses the additional training requirement adequately.

One could have the same debate with a transition from a basic Warrior to an airways equipped TB20. In that case, I am certain that adequate training is not available within the PPL sausage machine.

tunalic2
24th Nov 2007, 11:17
"I stand to be corrected on this one but actually in the case of GA flying is more dangerous than driving. On average someone dies in a GA accident in the US everyday!"
you can sit down
in the UK about 10 people die on the roads every day so your assumption is incorrect.
In the USA its two and a half times as bad on the road compared to the UK.
http://www.driveandstayalive.com/info%20section/statistics/stats-usa_indiv-states_per-capita_2003.htm#table-2
Aviation accident rates per 100,000 hrs flown is about 2.5
http://www.bts.gov/publications/transportation_statistics_annual_report/2005/html/appendix_b/html/table_03_11.html
But I found this
US accidents at 40-year low; UK figures
First Posted: Fri 16 Mar 2007
The US NTSB (National Transportation Safety Board) revealed this week that the number of aviation accidents in the USA in 2006 were the lowest in the 40 years that it has been keeping records
The board says that there were 1,515 GA accidents in 2006. 303 of them were fatal, and there were 698 fatalities.
The drop in numbers is partly due to a fall in hours flown, which the NTSB estimates was last year at its lowest since the early 90s (2006: 22.8 million flight hours; 1994 (for instance): 22.2 million flight hours).
The 2006 figure was 1.32 fatal accidents per 100,000 flight hours, 6.64 accidents per 100,000 flight hours.
See the NTSB statistic site for details.
So its all getting safer:)
enough of all this I'm off flying
T2

Tony Hirst
24th Nov 2007, 11:25
Search the AAIB database for "Ground Loop" is interesting and tricycles turn up in the results. However, the results for "landing", "grass strip", "farm strip", "prop strike" all seem pretty much configuration agnostic.

Myth Busted?

:E

Shaggy Sheep Driver
24th Nov 2007, 11:30
CT - a B747 is more difficult and more challenging to fly than a PA28. Is it therefore a more dangerous aeroplane than the PA28? :rolleyes:

SSD

Contacttower
24th Nov 2007, 11:46
Lies, Dam Lies and Statistics:

tunalic2 I don't know how the different methods of collecting data compare but the article that Chili Monster posted does disagree with what you assert:

Conclusion

Choosing "mile to mile" as the more appropriate comparison for differing modes of transportation (and overlooking that small planes often takeoff and land at the same airport, without ever really "going anywhere"), let's review the fatality rates:

driving: 1.32 fatal accidents and 1.47 fatalities per 100 million miles
airlines: .05 fatal accidents and 1.57 fatalities per 100 million miles
GA: 7.46 fatal accidents and 13.1 fatalities per 100 million milesI'm going to stick by that.

Contacttower
24th Nov 2007, 12:25
CT - a B747 is more difficult and more challenging to fly than a PA28. Is it therefore a more dangerous aeroplane than the PA28? :rolleyes:



Of course not. But that has a lot to do with the much greater reliability of jet engines, superior training, standardisation of procedures and the strength and redundancy built into the 747 compared to your average GA aircraft. The 'danger' comparison of the two has little to do with how hard they are to fly in the case of 747 vs. PA28.

The reason your statement is not relevant to this discussion is this:

When I said 'taildraggers are more dangerous than nosewheel aircraft' and 'my perception of risk increases slightly when I go flying in the Super Cub' I was drawing a direct comparsion between a GA type with a nosewheel and a GA with a tailwheel. Apart from the landing/take off they are the same; in the air they are both just as likely to have an engine failure, both have solid handling and are both as likely to be involved in a loss of control in VMC or any other accident that happens after take off/before landing.

The 747 however because it has many more engines, better system reliability and all the rest is inherently a safer plane.

Returning to the tailwheel vs. nosewheel I stick by what I said earlier:

Tailwheel aircraft are more likely to be involved in a take off/landing accident than a nosegear aircraft.

Who else is going to disagree with me? (Bearing in mind that I have the opinion of the US aircraft insurance industry on my side).

Edit:

As a little comparison:

When I did my FAA Sea Plane rating I was told that an amphibian was more than three times as likely to be involved in a landing gear related accident than a land based plane, reason being that the gear system is usually more complex and also that one has to remember to have the gear up for water and down for land. Does that make floatplanes dangerous? No. Does it make them more dangerous than a land plane (if we treat them as the same in the air)? Well yes I suppose it does.

englishal
24th Nov 2007, 12:34
The stats prove several things:

a) PPLs who do not continue training are the most likely to come a cropper
b) PPLs who continue beyone PPL level by adding further training (Aero's, IR, CPL etc..) are less likely to come a cropper
c) EF's in SEPs don't kill an awful lot of people
d) IFR at night is no more dangerous than VFR at night, but may be safer depending on where you are flying (i.e. proper IFR, not mickeymouse IFR)
e) IFR is safer than VFR (else all 777's would fly VFR)
f) Pilots of Twins, although less likely to be involved in an accident are more likely to be killed if they do.
g) MOST accidents are pilot error (75%+), or are contributed to be pilot error.

So the conclusion is: Keep training, add new ratings every few years, and be the best you can and don't take silly risks (while aero's is completely safe, what kills people is the bloke who thinks "oh I'll just do a low fly past and do a roll for my wife and kids".....)

By the way, the NTSB publish their stats so anyone can read them....

Contacttower
24th Nov 2007, 12:43
So the conclusion is: Keep training, add new ratings every few years, and be the best you can and don't take silly risks (while aero's is completely safe, what kills people is the bloke who thinks "oh I'll just do a low fly past and do a roll for my wife and kids".....)



Amen to that. :)

hobbit1983
24th Nov 2007, 12:56
So inferring from englishal's conclusions, the pilots most likely to have an accident are;

Qualified vanilla PPLs, flying VFR - and they're probably not going to die during a forced landing.

And you're much safer off under IFR - so quite possibly IMC, and also safer flying SEP & having done aeros.

So ideally we would keep the IMC and make it a worldwide qualification, and also bring back aeros & spinning to the PPL syallbus.

Or have I got it totally backwards? :}

BelArgUSA
24th Nov 2007, 13:26
Airline pilot here... one more year to go then will retire... I fly since age 15, and have logged about 22,000 hrs.
xxx
Who are experts in death statistics...? -
The experts are life insurance companies... Some years ago, I took a life insurance with my wife and kids as beneficiairies. I expected to pay an extra for premiums because I was a pilot... It was not the case. The fact was that I could fly as pilot with a commercial airline, and pay no higher premiums. But I would have had to pay extra if flying privately, or flying military aircraft... or had a motorcycle...!
xxx
The most dangerous lightplanes to fly: underpowered light twin engines... one example: the PA-23 Apache (2 x 160 hp) which is unable to maintain flight if one engine fails at maximum certificated weight. With an extra engine, twice as likely to have... an engine failure.
xxx
Taildraggers more dangerous - no - I dont think so... I learned to fly in a Piper L-4 (Cub) and got my PPL in such airplane at 17 of age. My son started to fly at age 13 with me, in a L-21C Super Cub, and he also got his PPL in that type of aircraft. As a knowledgeable pilot, I recommended to him to learn to fly in a taildragger first. A Super Cub will get you "out of troubles" much easier than any of the modern flying machines. You probably can land just about anywhere. And, if you landed there, you will be able to takeoff from that small piece of real estate. Not many planes can do that...
xxx
A 747 is more difficult to fly than a PA-28...?
I do not think so.
Of all the planes I have flown, I consider that the 747 to be the easiest plane to fly, extremely stable, and after 18 years flying it, never had any hard landing... Hand flying an ILS in a 747...? Put it on the localizer and glide slope, and it will stay there... With a PA-28, I bet you must fight all the way down the ILS from FAF to your touchdown.
xxx
:)
Happy contrails

Contacttower
24th Nov 2007, 13:45
Taildraggers more dangerous - no - I dont think so... I learned to fly in a Piper L-4 (Cub) and got my PPL in such airplane at 17 of age. My son started to fly at age 13 with me, in a L-21C Super Cub, and he also got his PPL in that type of aircraft. As a knowledgeable pilot, I recommended to him to learn to fly in a taildragger first. A Super Cub will get you "out of troubles" much easier than any of the modern flying machines. You probably can land just about anywhere. And, if you landed there, you will be able to takeoff from that small piece of real estate. Not many planes can do that...



BelArgUSA- you're clearly a much more experienced pilot than me and as someone who learnt on tailwheels you probably don't see any difference between the two in terms of the likelihood of a landing accident- but in the modern GA enviroment, considering that most taildraggers are flown by people who (like me) started on nosewheels and have the majority of their hours on nosewheels I can't help thinking that a tailwheel aircraft is more likely to be involved in a landing accident than a nosewheel aircraft.

ATP_Al
24th Nov 2007, 14:01
I'm not sure I see the point of this thread. Is the poster trying to absolve him/herself of any worry/responsibility because others say his flying is "safe?"

I would say attitude and training are the biggest variables in calculating the risk. Seemingly straightforward tasks and can be made very dangerous if you don't consider the eventualities and honestly assess your skill and experience. On the other hand you see plenty of "higher risk" flying activities accomplished safely because of the high standard of planning, decision making and training involved.

I'd say the most dangerous types of flying are those you're complacent enough to label as safe.

Contacttower
24th Nov 2007, 14:07
I'm not sure I see the point of this thread. Is the poster trying to absolve him/herself of any worry/responsibility because others say his flying is "safe?"



I think (Fuji correct me if I'm wrong) its just for interest mainly. One is never going to say anything is "safe" in absolute terms. Danger/safety is just relative in reality.

Shaggy Sheep Driver
24th Nov 2007, 14:08
I think the thread is showing that CT is lacking confidence in his TW ability, so feels safer in his NW aeroplane.

CT - I suggest you find a good TW instructor (not suggesting your previous one was not good) and get some more instruction. Then go fly your Super Cub in the circuit for as long as it takes for you to feel comfortable with it.

Then fly it some more. And some more. It's a great aeroplane and very safe. :)

SSD

BelArgUSA
24th Nov 2007, 14:10
Contactower -
xxx
Anyone "learning to fly" and asking me "which plane to learn to fly first", I would answer "a taildragger" in any case. I believe the best airplanes would be DH-82 Tiger Moth, or Stampe SV-4 with an open cockpit... The Cubs and equivalent (Auster AOP6 class) are second best trainers.
xxx
I realize 90% of the people now learn to fly in tricycle gear airplanes... and the transition from that type to taildragger requires most pilots some hours of dual instruction... I remember, having my taildragger PPL, getting qualified to fly a tri-gear C-150 required me to get... 45 minutes dual and 3 landings...
xxx
A comparison (about learning to drive cars) -
Would you learn to drive first, with automatic transmission, or would you first learn to drive a car with a clutch and 4 or 5 speeds... same philosophy. How about an old MGA and learn to double clutch down to the first gear which was not synchronized...?
xxx
All the best :)
Happy contrails

Tony Hirst
24th Nov 2007, 14:11
Contact Tower,
Tailwheel aircraft are more likely to be involved in a take off/landing accident than a nosegear aircraft.You seem a bit beleaguered, I don't wish to add to the onslaught, just some additional thoughts following a cursory investigation. I completely understand your rational but, surely the crux of Fuji's original post and this debate is to identify something more conclusive. Now if you wrote "Is more likely to widen the eyes a little more than usual" I might tentatively agree with you :) But I don't see anything to suggest tailwheel aircraft have more accidents during takeoff/landing.

I don't see any practical relevance to takeoff anyway, a tailwheel is only really unstable during deceleration - usually a small window of time at a relatively low speed a few seconds after landing. An aborted take-off is a distinct candidate for problems, but looking at the AAIB I find only one t/w in the 8 results and that was a turboprop that the pilot thought related to his abrupt use of reverse pitch.

Nobody can deny that a tailwheel requires a different technique and can more unforgiving in certain specific circumstances, but that lesser forgiveness does not, in my view, translate to danger or risk. Those are separate propositions that require more parameters that don't seem to be born out by some cursory searches of the AAIB.

Also, don't believe that tricycle gear aircraft are forgiving, they are not. There are numerous AAIB reports where "safety aeroplanes" have ground loops, overran, stalled, undershot, damaged the gear (particularly the nose) and struck props. These events seem to be just as likely regardless of the configuration, except that when searching the AAIB for "propeller struck", 4 out of 16 aircraft returned were t/w.

Interesting stuff :8

Contacttower
24th Nov 2007, 14:36
Anyone "learning to fly" and asking me "which plane to learn to fly first", I would answer "a taildragger" in any case.


I really regret not learning in a tailwheel because I certainly prefer flying them to nosegear aircraft.


I think the thread is showing that CT is lacking confidence in his TW ability, so feels safer in his NW aeroplane.



To be honest I do feel slightly safer in the PA28 than in the Super Cub...but that is completely different from lacking confidence. I little bit of fear and respect is a good thing...it keeps you alert and it stops you getting complacent. Perception has a lot to do with it.

CT - I suggest you find a good TW instructor (not suggesting your previous one was not good) and get some more instruction. Then go fly your Super Cub in the circuit for as long as it takes for you to feel comfortable with it.


I really don't feel I need to- I'm completely happy with my skills, I just recognise that as a pilot who learnt on nosewheel aircraft and who has the majority of my hours on nosewheel aircraft I am probably more likely to have a landing accident in the Cub than in the PA28. We aren't all as experienced as SSD!


I don't see any practical relevance to takeoff anyway, a tailwheel is only really unstable during deceleration - usually a small window of time at a relatively low speed a few seconds after landing.


Due to torque, gyro and weather cock it is harder to maintain directional control on take off in a taildragger than in a nosewheel aircraft. That is what I was taught.

Also, don't believe that tricycle gear aircraft are forgiving, they are not. There are numerous AAIB reports where "safety aeroplanes" have ground loops, overran, stalled, undershot, damaged the gear (particularly the nose) and struck props. These events seem to be just as likely regardless of the configuration, except that when searching the AAIB for "propeller struck", 4 out of 16 aircraft returned were t/w.


I'm going to spend some time on the AAIB website and try and find out exactly what the stats say on this. Until then I'll try and shut up because I must be sounding like a dog who won't let go of a bone.

To SSD and all those who disagreed with me:

Please, please don't get me wrong; I don't believe that taildraggers are 'dangerous' at all and I love the Super Cub...its a great plane and I will continue to fly it with confidence. I just think planes have become more idiot proof over the years.

I'm really sorry Fuji about this, the discussion is probably not what you envisaged at all.

Chuck Ellsworth
24th Nov 2007, 16:14
I just think planes have become more idiot proof over the years.

And therein lies the answer to this long discussion.

By making airplanes more idiot proof you open the door to having more idiots with pilot licenses.

I would like to make one more comment and that has to do with amphibious aircraft.

The reason there are a lot of landing accidents are due to poor training and lack of proper pre landing checks by the pilots...the aircraft are safe if operated with the gear in the correct position for landing.

Now I'll fasten my seat belt and wait for another onslaught of comments like I got commenting about judging height during forced landings.

Fuji Abound
24th Nov 2007, 17:41
I think (Fuji correct me if I'm wrong) its just for interest mainly. One is never going to say anything is "safe" in absolute terms. Danger/safety is just relative in reality.

Correct.

.. .. .. and a very interesting debate about perception, evidence (of which there has not been a lot yet) and explanation.


I'm really sorry Fuji about this, the discussion is probably not what you envisaged at all.

Actually I think it is very interesting. I suspect many pilots think tail wheel aircraft are more "dangerous". In fact I agree because my perception is they will try and get into short grass strips - sometimes they are just too short and they come to grief. Maybe I am wrong?

ChampChump
24th Nov 2007, 18:27
Having bitten CT's head off earlier, but ever so gently (although I didn't put the thumb up as I thought it wasn't necessary but some sort of smiley-thingy proabably was, with hindsight), I've kept fairly quiet but followed the thread with interest.

CT admits his choice of words wasn't as well chosen as ppruners allow. In a pub, we'd have thrashed that bit out over the first pint and moved on.

What most of us seem to agree on now is that for those whose training is in tricycle geared aircraft, conventional gear seems to convey anything from another useful addition in the private pilot repertoire to a part of the aviation chart marked Here Be Dragons. Well, there are dragons all over the chart. Gotchas abound, in any aircraft, with any rating, in any weather.

I repeat: people make accidents. With decent training, from those decently experienced on type, we can reduce risk. If we accept we know less than we thought we did, try to take nothing for granted and still have fun, it's a risk worth taking.

And I don't think statistics prove a damned thing, either way.
:ok::ok::ok:

Tony Hirst
24th Nov 2007, 18:47
Rotory, now there be dragons :}

Major Major
24th Nov 2007, 19:55
G-EMMA

You've nailed it there. It's either Freakonomics or the Undercover Economist, I forget which, but in one of those books exactly that statistical analysis is done.

And the answer is predictable - in terms of hours doing the activity, flying is more risky than driving, because people spend less time flying than virtually any other activity. Even passenger flying on a big jet is more risky than driving. I'm not sure how the probabilities are skewed for private pilots but I'll dig out the books tonight and have a look.

I often think 'I could die whilst doing this', or, 'get it right or there's a risk you'll be dead'. I actually think it helps focus on getting things right, as I'm convinced even as a stude that everything I've been taught is for a reason and therefore doing it reduces the likelihood of death or serious injury.

I secretly think the risk is one of the reasons I do it... Interestingly, every non pilot I've spoken to thinks it's more risky than it is...

Stick & Rudder makes a case for tailwheels being more difficult to fly than tricycles. Whether or not that converts into risk or any difficulty is netted out by the additional training required is up to your individual perception of risk.

Fuji Abound
24th Nov 2007, 20:02
G-EMMA

flying is more risky than driving

Are you sure, remember I know how you drive.

Fly-by-Wife
24th Nov 2007, 20:15
There are actually a few facts available to support the contention that tailwheel aircraft are more difficult to operate in the take-off, landing and ground-handling phases.

1) Position of the main wheels relative to the centre of gravity.

If the aircraft heading is slightly different from the aircraft's direction of motion, a side force is exerted on the wheels. If this force is in front of the center of gravity, the resulting moment rotates the aircraft's heading even further from its direction of motion. This increases the force and the process reinforces itself. This is a divergent condition. To avoid a ground loop, the pilot must respond to any turning tendency quickly, while sufficient control authority is available to counteract it. Once the aircraft rotates beyond this point, there is nothing the pilot can do to stop it from rotating further - et voila, the groundloop!

This is simply not the case with a tricycle gear, as the moment tends to correct the deviation, not reinforce it.

Someone said that groundloops can only happen on landing - well crap! The aircraft doesn't care whether it's coming or going - if the deviation starts (for whatever reason) it will tend to increase, whether on take-off, landing or taxying.


2) Angle of attack of the wing when on the ground.

In a tail-wheel aircraft, the wing is at a high angle of attack when on the ground, leading to handling problems in windy conditions.

Again, this is simply not the case with a nose-gear aeroplane.

3) Poor forward visibility.

Due to the poor forward visibility, landing approach alignment, judgement of flare and taxying are all more difficult than in a tricycle aircraft.

4) Gyro effect

Associated more (and rightly so) with high-power engines, there is an additional gyro effect (swing) with tail-wheel aircraft that is not present in nose-wheel types - i.e. when the tail-wheel lifts off. Combine this effect with the others above to increase further the difficulty of a tail-wheel take-off compared to a tricycle.

Note that the points above simply show why a tail-wheel aircraft is more difficult to fly than a nose-wheel type. It would only be more dangerous if the operator was unable to master the difficulty.

fbw

Contacttower
24th Nov 2007, 20:24
You've nailed it there. It's either Freakonomics or the Undercover Economist, I forget which, but in one of those books exactly that statistical analysis is done.



I can't remember any specific reference to flying vs. driving in Freakonomics, although it's a long time since I read the book so I may have forgotten. It's a great book anyway (apparently though the claim he makes about the effect of legalising abortion in the US on crime levels is rather dubious).


I remarked the other week whilst making a pigs ear of a landing in a PA-28 that it was a good job I wasn't flying a taildragger. It would have bitten me for sure. Aeros and taildragging (maybe even at the same time) second on my list of must do's after gettting the PPL. :ok::ok::ok: (lots of thumby thingies)



May I tentatively suggest a good book on taildraggers: The Compleat Taildragger Pilot by Harvey S. Plourde. Written by one of 'old school' US instructors its full of practical method and advice on flying conventional gear.

bjornhall
24th Nov 2007, 20:31
While a few do indeed use GA regularly for travelling, most GA flying has nothing to do with getting from point A to point B... So how then would a "transportation oriented" measure, such as fatalities per passenger kilometer, actually tell us anything useful?

I'd fly anyway; it being safe is just an extra (very welcome!) bonus... ;)

Contacttower
24th Nov 2007, 20:55
So how then would a "transportation oriented" measure, such as fatalities per passenger kilometer, actually tell us anything useful?


The analysis I refered to does recognise that a lot of GA flights don't actually go anywhere. Stats are always going to be a compromise but I think the page that Chili Monster originally posted made a decent stab at comparing driving and flying.

Kit d'Rection KG
24th Nov 2007, 21:21
Here's what Chilli Monster found:

GA flying covers small training aircraft capable of cruising at 100mph, and business jets capable of cruising at several hundred miles per hour, so choosing an average cruise speed is difficult, but for the sake of argument, we'll choose 150mph. This gives us a comparison of:

GA: 7.46 fatal accidents and 13.1 fatalities per 100M miles
driving: 1.32 fatal accidents and 1.47 fatalities per 100M miles

So when compared on a mile to mile basis, flying has 5.6 times as many fatal accidents, and 8.9 times as many fatalities (these number would be even worse for flying if we took out motorcyle and pedestrian fatalities).
How about if we compare on an "hour to hour" basis? That requires an assumption of an average speed for autos. We'll choose 40mph. This leads to the following numbers:

GA: 11.2 fatal accidents and 19.7 fatalities per million hours
driving: .528 fatal accidents and .588 fatalities per million hours

On this basis, flying has 21 times the number of fatal accidents and 33.5 times the number of fatalities per hour of operation.

(With thanks to the orginators of the information).

These stats are not by any means precise, though they're about as good a stab as you'll find. I'm comfy with them as an accurate representation... :cool:

I hesitate to say this, but the numbers for some sorts of GA (gyroplanes, for example), are horrifyingly worse. :=

Kit d'Rection KG
24th Nov 2007, 21:23
I should have said 'sport aviation' rather than 'GA'. :)

Also, this site should allow editing of posts without all the carriage returns disappearing. Posh code for this and that, but the basics need to be right! :uhoh:

Sam Rutherford
26th Nov 2007, 07:34
If we agree that flying (okay, taking off and landing) tailwheel requires more concentration than nosewheel - then it probably makes them safer!

Steve Fossett didn't disappear whilst trying something extremely dangerous/complicated etc. He disappeared (as I understand) 'heading home'.

It's not the full aerial display that's the danger, it's the 'extra loop chucked in at the end'.

You get my drift.

Just my tuppence-worth!

Sam.

sternone
26th Nov 2007, 07:40
Steve Fosset was flying an acrobat machine.. it could be he was doing some acro just for fun in some sort of a canyon.. we don't know that is was just straight and level flight ... may he RIP!

Sam Rutherford
26th Nov 2007, 07:44
...it's the 'extra loop chucked in at the end'

We'll never know for Steve, but my point stands.

Sam.