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Single engine public transport IFR

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Old 13th Jun 2002, 10:05
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Single engine public transport IFR

Single engine public transport IFR is on it's way by the sound of things.

What are the implications for those of us flying in the UK?

... and how do we feel about it?
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Old 13th Jun 2002, 14:16
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They do it in Canada ,using Caravans (C-208) and the Pilatus PC-12s. The Caravans have been passenger operation for > 10 years.
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Old 14th Jun 2002, 01:29
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I thought it had been done before in UK with a certain LN regestered C208 Caravan in scotland????????
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Old 14th Jun 2002, 17:10
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It was done for a while ex LTN too, but the CAAput a stop to it.

The regs on SE IFR for Public Transport date back to the days of piston engines right after the war. It seems utterly ridiculous that modern turbine engines with a failure rate several orders of magnitude better than those old pistons are still prevented from earning money. Refusal to allow this is surely the worst kind of craven bureaucratic dinosaurism. Turbine singles are proven to be several times safer than piston twins which are allowed SE IFR, so what is the problem???

Think of the possibilities for Pax carying Caravans with operating costs of under $200 per hour in the UK. Imagine commuter services from Norwich, Exeter, Bristol, Bournemouth etc to London. People would buy season tickets! Imagine the improvement in services to the Highlands and Islands, no more costly Twotters. Imagine the postal delivery potential. Imagine the jobs and prosperity it would create in the general aviation environment.

Imagine coupling this with on-board precision approach systems (DGPS), aviation in Europe would never look back.

Don't hold your breath though...

Last edited by Agaricus bisporus; 14th Jun 2002 at 17:16.
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Old 14th Jun 2002, 18:34
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So Agaricus bisporus, regardless of the fact the propulsion is more reliable, where exactly does the aircraft go when an engine failure does occur and the cloudbase is below safety height??
Also how can a MULTI engine aircraft depart on a flight SE IFR??? Can you point me at the official statistics which back up your claim that turbine singles are "several" times safer? I'm no fan of the JAA/CAA, but on this issue they are absolutely right to ban SE public transport IFR. (what private flyers want to do is their business or should I say risk..) Also, many of these flights would be single crew operations, which is an even greater potential risk than one engine....
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Old 14th Jun 2002, 19:23
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Yup it would be pretty nice flying a spiffy new PC 12 or TBM 700. 300 knots, FL 290 , glass cockpit , new airframe... right up to the time the pilot light went out on the ( only ) stove.....
 
Old 14th Jun 2002, 20:35
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basil f - I can't point you at the statistics off the top of my head, and I can't be arsed to go looking for the them, but it's a fairly widely known fact that the highest accident rate of all categories occurs in the twin-engine piston category - the FAA has the stats somewhere. Something to do with the "I've got another one which will get me home if one fails" frame of mind. If you've ever flown a light piston twin you will know that most of them need to be VERY well flown to maintain altitude if they are anywhere near gross weight, and most of them won't maintain altitude at a density altitude of anything over about 3000'

You are right though, that if your single Primus goes out with the cloudbase on the deck you're in deep poo!

I reckon they should ban piston twins from public transport IFR too.
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Old 14th Jun 2002, 20:44
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tired,

you're not wrong!
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Old 15th Jun 2002, 11:13
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$200 an hour?????? I'll take 6............
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Old 15th Jun 2002, 17:01
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Here in Europe, the debate unsurprisingly is polarised into the "Britten-Norman" camp and the "Pilatus" camp. The Pilatus camp seem to be slowly winning, whilst BNG are holding things off as long as they can.

It's a difficult one isn't it, we all know the safety benefits of a second engine, yet it would be nice to see a regulatory environment that allows a coherent air-taxi service around Europe.

I suspect that when JAA finally permits it, it will probably be tied to a maximum number of pax and some other additional safety requirements. What's probably really needed, is an honest statement of the relative risks to allow pax and aircrew alike to decide if they want to play, but I doubt if that will be forthcoming from any official source.

G
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Old 16th Jun 2002, 02:04
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There are various documents about in different countries addressing the regulatory worries. At the end of the day, it comes down to risk assessment and risk control.

The historical failure rates can be determined and, a bit like ETOPS, the aim will be to achieve the sort of rates acceptable on existing operations.

So far as the concern about what do we do if the only one stops, operational restrictions can be developed to provide a reasonable chance of a successful forced landing .. things like minimum cloudbase and below base visibility, maximimum distance from a suitable forced landing aerodrome considering operating heights, specific crew training programs etc etc

Nothing is perfect in this world .. all we can do is try to control the risks our way. Given the commercial pressures, it is likely to be only a matter of time, education, and development of sensible controls before SE commercial ops are an accepted thing.
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Old 16th Jun 2002, 14:26
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All,
--------Don’t confuse me with facts, my prejudices are already made up----

If one were to examine the facts on engine failures, and we exclude all the big pistons, ie R-3340’s and R-4360’s, etc, Aaaamazingly enough, we will discover that engine failure, as a cause of accidents is miniscule, regardless of whether it is a small turbo prop, or a piston engine.

Also, don’t confuse the reliability of the big turbo fans with small turbo props, it ain’t the Jet-A.
In fact, the engine failure rate for small turbo props and small pistons, caused by other than finger trouble, is very similar, ie not statistically different.

“Tis all on the various web sites that have the stats., particularly FAA and various NTSB and related.
In some areas pistons have fewer problems, no turbine likes stones and small babies, particularly little Garrets and Allisons ( or should I say Allied Signals and Rolls Royce)

The Australian Campaign Against Safe Aviation ( CASA) have topped and tailed JAR-OPS 1 for A Part 121A and done it again, more or less, for under 5700 kg, and called it Part 121B.

I am wondering how long before the penny drops, because they have ( amongst some truly amazing nonsense --- full ICAO Operational Control for everything “Public Transport” except local day VFR ,within 20 nm and no away landings, sightseeing.) built in a requirement for a quasi Pans-Ops Doc. 8168 obstacle clearance requirement---- engine out---- and I have yet to see any single with a (sustained) positive rate of climb engine out.

I wonder what we in Australia are going to do with all the Royal Flying Doctor Service and Ambulance PC-12s, sundry Caravans ets, won’t be much of a service limited to day VFR, after ALL THESE YEARS of H 24 IFR ---- and all the serious accidents have been with the King Airs, and engine failure has NOT been the cause of any.

Tootle pip !!
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Old 16th Jun 2002, 22:00
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You can argue stats till you're blue in the face but I would'nt take the wife and kids across water at night in a single engined anything. Having said that, a turbo prop at fl 200 has a lot more options, especially with gps nav kit and a decent autopilot, when the front end does go quiet. It might work for night freight along specific routes. Funny how the RAF gets to fly single engine turbines all the time and they never break down do they?
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Old 17th Jun 2002, 14:03
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All,
Of course, if you are a Fleet Air Arm type chappie, the single engine only goes into Auto Rough when you are out of gliding distance of the water.
Tootle pip!!
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Old 17th Jun 2002, 21:21
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The french "Armée de l'air" (Air Force) is using TBM 700's since 12 years, and they never managed to break one !
They use it to fly Generals and ministers around the country, so I guess they are reliable.
A Socata test pilot told me that they never had an engine related accident on the TBM fleet.
I am gonna have one soon to fly my boss around Europe, and I will feel definitely safer in this toy at night than in the Seneca we are presently using !
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Old 18th Jun 2002, 15:25
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I have a whole lot of time in both the 'van and the PC12, and I basically never felt scared by the whole thing. Granted, only a fool would head out of gliding distance of shore on one fan, but that's hardly necessary now is it?
The last I checked, the only reason a caravan engine had EVER failed in flight was due to lack of fuel (pilot induced) or oil (generally from leaving the dipstick in the bottom of the cowl). The only concern I ever had there was ice, because the 'van sucks in icing. That is of course an entirely different set of rules.
As for the PC12, I was seldom out of gliding distance of a field even in northern Canada where fields are few and far between. Departing Thunder Bay for Sault Ste. Marie, (right down the middle of Lake Superior--a huge puddle of fresh water) there is only a 10 mile stretch where one is not able to make an airfield. There is never a time where dry feet is not an option. I would (and have) take a PC12 down V300 any day, but wouldn't try it in any twin smaller than a B100. At FL250 you can glide 65 miles in still air, and with the GPS and moving map features there is never a question about where one might land. As training pilot, I would make 200hr co-joes do zero thrust (simulated dead stick) approaches (ILS in IMC) from at least FL200 as part of the mandatory line indoctrination (I wrote the rules for our company). They all made it. The captains had to do one to landing into a 3500' dirt strip on GPS alone under the hood. It was easy with the equipment on board that bird. Off strip would be little worse since the structures on those things are built like a tank for one, and the stall speed is so low that landing anywhere except directly into a rock face is almost certainly survivable.
I'll take the PC12 any day over some of the broken down old piston twins and B99's that are flying around here anyday!
But that's just my opinion....
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Old 18th Jun 2002, 23:58
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Very informative post Elliot.

I think what we are seeing here is fear of the unknown, resulting in personal prejudices. Mr. Moose has done the single engine thing for some time, and appears to have done it right. If it's new to you, it probably does seem a little scary.

On the subject of personal prejudices, I can relate that in some 25 years working in flight test and other flying areas for several manufacturers, I have seen many engineering types (self included) with severe prejudices against flying with particular operators, but only one guy with a fear about a particular aircraft type. That was a Boeing field service rep who kept a list of which 707s had which SBs done. He always consulted it before boarding a commercial flight.
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Old 19th Jun 2002, 00:22
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Like my old pa said "son the only reason I fly four engined aircraft is that they don't make one with five"
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Old 19th Jun 2002, 01:27
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I should think that the Boeing rep was not being paranoid .. merely, with privileged knowledge, being prudent .....
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Old 23rd Jun 2002, 00:38
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Quite right, John.

I was just trying to make the point that differences in operator's attitude will have a bigger impact on your chances of a safe flight than relatively minor design differences, like number of engines.

To follow up on TeeS's post, there are lots of well documented cases of simultaneous engine failure on 2, 3 and 4 engine airplanes (usually operator error). At the same time, guys like E. Moose are doing safe single engine commercial ops day after day.

It's not how many engines you have, it's what you with them.
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