PC-12 vs. Turbo Commander [Archive]

SNS3Guppy

28th Feb 2011, 12:52

That really depends on your priorities and intent. The Grand or Renaissance Commander is going to be less expensive as an acquisition, but more expensive to operate. The PC12 will use less runway, but won't stay airborne after an engine failure. In fact, the PC12's claim is that one always has a runway in gliding distance because the airplane glides so well. that may be true in Europe or the Eastern United States, but it's certainly not true in most of the rest of the world.

The PC12 is a comfortable airplane; the Commander feels like a sports car. The PC12 feels more like a King Air inside; it's roomier. The Commander is narrower, especially in the cockpit.

The PC12 is much newer, more user friendly; the commander has some maintenance quirks and difficulties that can leave one tearing one's hair out (ask me how I know; I'm bald). Neither one would be a bad choice.

If I were to choose between the two, operating cost being no object, I'd get the Commander with some good avionics.

The Commander does have a reputation for losing it's tail in turbulence. In the early 1990's there were several airframe losses (nearly a dozen) and control losses during high speed descents in Commanders, due to aileron rigging and issues associated with the Frise ailerons. The United States National Transportation Safety Board noted that operationally, most users tend to do high speed descents in the airplane to get the most utility out of the aircraft. Personally, I didn't; nor did I push them to their limits in any other way.

ksjc

28th Feb 2011, 13:31

I operated a 690B for many years.

The good: FUN to fly. Very sporty. Fast. Good short field action. Easy in/out with entry door low to ground. Rugged. Pax like the picture windows. Did I say fun?

The not-as-good: Avionics likely to find installed will be ancient. Loud prop noise inside and very loud engine noise outside on ramp. TPE-331 and NTS can be fussy and tricky to rig properly...you will need a good mechanic. Cabin space OK but PC-12 much better. If you pride yourself on smooth landings she will humble you.

Sort of like an old car? Take care of her and she will provide loads of fun.

SloppyJoe

28th Feb 2011, 13:45

Are you going to be the pilot. If you are and have a descent amount of single pilot experience in a fast twin in IFR then Commander is OK. If you have limited experience go for the PC12, it will be safer for you and your family and that's the main thing I expect.

Have about 2000hrs in the commander and about 1000 in a caravan (yeah not a PC12 but expect similar) If you are going to fly don't let your ego endanger you family if you are not going to stay current or have limited experience, the PC12 will probably be easier to fly than a 206 or 210, the commander can get you into trouble very fast.

His dudeness

28th Feb 2011, 17:18

zlakarma, I don´t understand why the comparison between a new PC12 and an very old design with comparatively little numbers built.

Why not look at a good KingAir B200? With Raisbeck mods, maybe a Blackhawk mod, Winglets and retrofitted avionics, preferably after S/N 1476 (the new cabin interior), you can get a very good example at a substancially lower price than a new PC 12 and enjoy twin engine safety. The PC 12 is surely a good aeroplane (haven't flown one), the B200 I know inside out and it is - IMHO - one of the best airplanes one can buy in its class. Sturdy, big, easy to fly, good reliability, good looks...
Yes she sips a tad more fuel than a AC, but one can actually talk to each other when sitting inside. And only one thing is better than a PT 6 - two of em! P&W dependable power.

Do yourself a favour and buy an airplane where you can get simtraining. Even if you are not flying yourself, then have your pilots do it. THAT is the best investment on safety you can make.

zlakarma

1st Mar 2011, 07:05

Thank you gentlemen :cool:

7AC

1st Mar 2011, 08:20

PC12 hands down.
Modern, spacious, straightforward maintenance, excellent fuel economy quiet.
Only downsides are the price and a perception " It's only got one engine". (This will
just force you to be more careful about maintenance and fuel cleanliness, not bad habits
to have).

hum

1st Mar 2011, 08:47

These are very different aircraft. I agree with SN3 both are good personal transport... but as you know there are significant differences you must consider:

A new PC12 will prob cost you $2 - 3m more than a late model dash 10 Commander with good avionics. However, you must accept that a complex 25+ year-old aircraft will cost more to maintain than a relatively simple new machine.

A Commander will do 300ts and if you have extra fuel option can have comfortable 1700nm range. I'm not familiar with PC12 performance but guess 240 kt ish cruise. Speed is everything to some people...

Commander has good short-field performance, but not as good ground clearance or rugged gear as PC12. I would not be comfortable operating a Commander regularly from Grass for example.

You can get sim training on the Commander but must travel to Flight Safety in Texas.

There are several Commanders operating in Europe and good engineering support is available. Air Plus in EDNY were recently appointed as a Commander Service centre; they are good.

PM me if you wd like to know more about operating a Commander in Europe.

Propellerpilot

1st Mar 2011, 20:38

I agree totally with what has been said here. Another interesting fact about the commander is, that it only uses 80lbs/hr more than the PC 12 - not bad for having an extra engine.

silverknapper

2nd Mar 2011, 01:55

I would second the suggestion to look into the king air option, new or pre owned.
Best of both worlds I guess. New machine = less potential for nasty surprises. Plenty about, no shortage of pilots or technicians.
An in depth look at the running costs and performance can be informative too.
My understanding, and I'm prepared to be corrected, is that the PC-12 requires maintenance every 100 hours. Compared to 200 for the 200. So depending on your utilisation the running costs overall aren't necessarily cheaper.
Contaminated runway perf on the PC-12 sees a degradation in it's short field by quite a considerable margin.

The point I'm making is that there are more factors to consider that require in depth investigation. And with your family and safety at the forefront of your considerations a twin really should top your list in my opinion.

Its a nice choice to have though so should be good fun searching!!

rigpiggy

4th Mar 2011, 16:24

what is your annual utilization going to be, what are your leg distances, airfields, loads like.

an older B200 with 1/2 time engines runs around 500k, add 150k for garmin 600/1000 upgrade, new interior for 75k so lets figure 700k for a dolled up KA200. Yes the PC12 is cheaper to run but over say 10 yrs, is it worth the 2-2.5M difference?

Shell Management

5th Mar 2011, 16:52

Buy the twin, thats the safest option.

formulaben

5th Mar 2011, 23:27

Only downsides are the price and a perception "It's only got one engine".

That's not a perception. It is a REALITY.

Recently an operator conducted an informal survey of PT6 operators (King Airs) and the results of those who confirmed an engine failure was surprising at best. One operator confirmed 2 failures. The problem is that the FAA does not track failures, only fires and accidents. It is a statistical possibility that a PC-12 will suffer an engine failure: that makes it a certainty, with time. Minimizing this is a disservice to the OP.

silverknapper

6th Mar 2011, 14:12

This will just force you to be more careful about maintenance and fuel cleanliness, not bad habits to have).

One could argue you can be as careful about maintenance and fuel as you like. But if an engineer doesn't correctly fasten an oil hose (seen it) or you take a bird (seen it) then you're gliding. And this rubbish about always being within gliding distance of a field? Well you may take that chance if you like, I'd rather not. I can think of several areas I'd rather not be trying to glide to a field. And you get one chance at it. That's it. So you better hope you're at the top of your game when the unfortunate event happens.

I don't want to sound anti the single. I love them, think they are fantastic machines, especially for the owner pilot. If I had the means and I flew myself places on business a TBM 850 would be hard to beat. But the OP specifies family and safety. It's a no brainer.

formulaben

6th Mar 2011, 14:36

And to clarify, like above, I'm not anti-single either. It's just that it seems those who endorse this product tend to dismiss the risk as if it's inconsequential. It's not. You don't even need to have an engine failure to be a glider; a prop hub or governor failure, etc will result in the same. Having said that, I think it's a great product, but you wouldn't catch me flying it over mountains, especially at night like I see all the time in the western US. :=

theficklefinger

7th Mar 2011, 16:51

C441 or C425

Pick the first if you want to pay extra for the speed and range, pick the later if you want something bullet proof, a little slower, but will always fire up and take you everywhere.

Charley

11th Mar 2011, 09:33

Some good advice offered above. I've also accrued some time on Twin Commanders, mostly 690/690A/690B's.

zlakarma - you mentioned getting a TC with the -10 conversions and in excellent condition. Some others mentioned the Grand Renaissance but you did not specifically do so. If your intended aircraft has not been through that programme, make very sure that it is in as good a condition as it seems to be before you buy. In my experience, certain things tend to get quite tired if the aircraft has not received the same level of love throughout its life. For example, pressurisation can be a pain so check your aircraft makes max. diff. (or at least whatever diff you need for your intended profile). I've flown many Commanders that simply don't. Even when the owners of others have said that the pressurisation is top notch, the pilots have sometimes told a different story.

Also the environmental sytem/air conditioning (particularly on the earlier models) can be a bit hit and miss, the refrigeration unit in the back can be expensive to replace if required and occasionally owners simply choose not to get it done.

I'd also echo SNS3Guppy's advice about high-speed descents. The book calls for it and I know many that do it, but I don't. A 180kt/1500fpm descent works out pretty good too and 180kts also happens to be the moderate turbulence penetration speed, so less panic if you suddenly enter some on a night-time or IMC descent.

Finally a fair few of the 690's still in circulation have been modified for aerial survey use. You may find odd holes in bulkheads and other mods if it has. If this applies to your potential acquisition, check they're all documented, particularly if you will need an export CofA.

I don't have any experience of the PC-12 to compare against. I'm not averse to single-engine types, however I do like an easy life and if I have an engine failure then I'm quite happy for that to be the only part of the emergency. On an S/E type, and engine failure also means a pressurisation failure/loss of generator power/loss of primary hydraulic pressure and so on. Making a crisis out of a drama....

NZ X man

13th Mar 2011, 10:08

Both good aircraft, but I would not consider anything in the Rockwell line other than the 1000 commander, and find one with the EFIS mode. Great aircraft, fast, economical, cheaper than the price of a PC-12 I believe. 1700 mile range, FL350 service ceiling, it was 18 inches longer in the cabin than the 690's 980 and 840 I believe. The EFIS mode comes with its own auto pilot mode, so that it is more compatible.

My two cents

Deltabravowhiskey

13th Mar 2011, 10:59

The PC-12 has a far lower probability of failure than any single engine made. A low time pilot has a very high probability of killing himself (herself) despite a perfectly flyable aircraft after the fact due to inappropriate management of the situation. And engine failure in a twin is everybit the emergency in a single, you are landing...now.

A twin (fact) has 4 times the risk of engine failure than a single engine PC-12...

Why?

A Twin turbine has to use the smallest engine possible running at the highest power close to its maximum thermo dynamic rating in order to offset the inefficiency of having TWO engines.

Due to the lower power required of the motor it is highly likely that you will get 15,000 hours out of the engine without any significant replacement costs aside from your hot section inspection costs. Cruising at LRC up to LRC +15kt range will insure the lowest turbine creep unit rate and virtually eliminate machining of the turbine ring during hot sections. Fuel flow at this range is around 240-260lbs an hour fuel burn depending on temperature.

The PC-12 in contrast uses an engine rated at 1600hp, it is rated to run at 1200 hp for take-off and 1000hp at maximum continuous. However, if you operate a PC-12 taking into account fuel/time/cost etc you find that the actual power setting is around 800hp or 1/2 the engines power rating. This nets a TAS of around 240-250kts and double the range of any turbine twin.

The PC-12 to date has the lowest failure rate of any turbine built, when I last checked there have been 2 documented failures, both were low time aircraft.

The other issues revolving around the engine were not failures but failures to follow procedures to maintain power sufficient to continue flight.

With a PC-12 using "ETOPS" type flight planning insures that you are always within glide range of a suitable airport. With a 20:1 glide ratio a twin engine will be on the ground after an engine failure before a PC-12 lands with its one engine out. In other words, you will not be cruising in the mid teens, instead most flights east will be at FL280-300, westbound mid to low 20's depending on winds. It's a high altitude airplane unlike most twins that cruise in the mid teens to low 20's to get maximum IAS.

When you factor in range, cabin noise, comfort and utility the PC-12 is a tough airplane to beat with the lowest direct operating cost per hour, the savings alone depending on utilization will make the airframe payment vs an aircraft 1/3 its purchase price with two engines.

What you save on the upfront purchase price on a twin is lost in the costs with two engines, more than double the fuel consumption, reduced range, increased cycles, and higher avionics costs to maintain obsolete systems.

Flight plan a non-stop flight from Seattle to Miami in a PC-12 wtih FLL as the alternate. Then do the same in the Turbo-Commode...you can't.

His dudeness

13th Mar 2011, 12:17

And engine failure in a twin is everybit the emergency in a single, you are landing...now.

Can´t say I agree.

iwrbf

13th Mar 2011, 14:28

Hi :-)

I think the eternal discussion about Twin versus Single is just going into the next lap...

Twin vs Single is - IMHO - a quiet personal question: I prefer not having to swith to "glider mode" in an instance, especially whilst near the mud. Someone else might fear the asymmetry more than "gliding into the night". For each one his own...

Question: Is a turbine running on its design goal, thermodynamically speaking, more prone to failures than a de-rated, larger turbine? I do remember reading a tech article about the de-rated turbines being more prone to carbon residues etc. - literally negating the benefits of lesser thermal strain...?!

Btw, I would never try to fly from Seattle to Miami NONSTOP in a PROP *shudder* :-)

Kind regards,
Peter

silverknapper

13th Mar 2011, 16:37

DBW

You obviosly know your PC-12, and this debate has been done before.
But a couple of points you make I can't agree on. If you could expand on them it may be helpful.
The PC-12 has a far lower probability of failure than any single engine made

Can you back this up. I have never seen this published. I've seen claims alluding to this but per flying hour etc etc is it better than caravans, TBM's or even a Bonanza?

And engine failure in a twin is everybit the emergency in a single, you are landing...now.

Disagree entirely. If one has an engine failure in a turbine twin I wouldn't consider it an emergency. I am not landing now. I will continue my climb at 600fpm or so minimum, get to msa, consider my options and then make an approach somewhere and land on the runway where there are emergency services on hand. Contrast that to any single, 300' ceiling, engine fails just as you pass over the end of the runway on departure. What are you going to do. Or indeed anytime. You are going down.

A twin (fact) has 4 times the risk of engine failure than a single engine PC-12...

Rubbish, I'd like to see the evidence of this!!

when I last checked there have been 2 documented failures, both were low time aircraft.

Google pc-12 engine failure. More than two.

You mention more than double the fuel consumption. Again I disagree. I flew a 200GT this morning at FL290, TAS 292 burning 600lb/hr.

You clearly know the PC-12. Can you confirm the inspection interval is 100hrs? Surely this is a major negative compared with a machine at 200hrs.
What effect does runway contaminant or icing conditions have on your performance? I have seen the numbers, not very good.

As I said before I think they are great machines, but the original post asked about safety. There is no competition for the twin on this criteria. And I get frustrated reading comments such as there have only been two engine failures on PC-12s. There have been many more. I hope they sell many more airplanes but only to informed customers, not people who are being told they have no worries about engine failures as they don't fail and if they do they'll reach a field but they are no safer than twins anyway as both are going down regardless.

rigpiggy

14th Mar 2011, 18:25

I also understand that the RCMP had a engine failure out of YZF, they turned around and landed safely on the reciprocal runway. No accident ergo no paperwork. Can any CDN PPruner's confirm or deny

20driver

14th Mar 2011, 19:03

I would say how the plane is operated has to be taken into account.

There is a difference between a two man crew full time professional crew versus a lower time single pilot owner operator situation.

Another factor is age of the airplane. You are more likely to have problems in an older, more complex plane. Who is managing the MX is also a legitimate factor. An out of the box PC-12 under factory support is going to be less work that an older twin. Who is going to be doing that work?

If it is single pilot owner operated I'd be inclined to go for a new PC-12.
Nice problem to have either way.

20driver

SNS3Guppy

15th Mar 2011, 07:53

A Twin turbine has to use the smallest engine possible running at the highest power close to its maximum thermo dynamic rating in order to offset the inefficiency of having TWO engines.

This is a ridiculous statement.

A twin turbine most certainly doesn't have any need to use the smallest engine possible. Neither is there any need nor requirement to run at "maximum thermodynamic rating," and neither is there an inefficiency associated with two engines.

I gather you have little or no multi engine time, and certainly no turbine multi-engine experience. Is this so?

rigpiggy

18th Mar 2011, 18:51

and what is the PC-12's thermodynamic rating at, what ITT is it at at FL290

SNS3Guppy

18th Mar 2011, 19:45

Are you asking a question that you can answer?

I don't fly the PC-12. If you have a point to make, then make it.

When you ask about a thermodynamic rating, are you referring to the maximum ITT, or are you referring to the maximum torque/horsepower output at maximum ITT at that altitude, under a given set of environmental conditions?

theficklefinger

19th Mar 2011, 01:42

These debates are usually fought by those that don't fly over water, in the clouds, over mountains, or in places where an un-powered landing means certain death.

Only an idiot pays $3 mil for a single engine aircraft, thinking that some how years later, after 5000 hours of hoping that he doesn't have to ditch his aircraft...NOW he can reap the benefits of only having to pay for one engine to overhaul.

Reminds of doctors buying a $450,000 Bonanza, when a $150,000 Cessna 340 would have been a much better choice, but hey, they thought it was a good idea to not have to spend a week, and $1000 working on a twin rating.

This argument would be mute if everyone in here had to take off from Bagdad to Kandahar, knowing that ditching at anytime meant you would get your head cut off on the internet. Amazing how all the statistics would go right out the window.

Carry on.

SNS3Guppy

19th Mar 2011, 06:31

I don't know about that. I've got plenty of time flying in very hostile terrain in single engine and multi engine airplanes, including flying both at low level in active wildfires in very cut-up terrain, as well as flying in places where lots of people are shooting.

My interest here are the false claims made thus far. Certainly if one wishes to fly single engine in the mountains or over the sea, so be it.

Afghanistan is another animal. Contractual requirements, as well as performance requirements dictate that most operations are multi engine.

There are operations conducted there using PC-12's, however, as well as Cessna 208's.

jackcarls0n

19th Mar 2011, 16:12

Not sure about the pc-12 or the twin commander. But I love the twin commander. Though just flew as a passenger.

I fly singles over the mountains(the highest ones in the world). It sure does lack the performance and they is always a thing in the mind. An engine failure can occur anytime. And its rare that you have a flat field around to land (one would need atleast 1500 ft of flat land, that is like 3 lenths of football field, that is rare to find). So I wished I were flying a twin and not worry about the only engine I have.

I guess multi engine aircrafts were build for the fact they could carry more and provide additional safety.

For 3 million, you can get a DO-328.

formulaben

19th Mar 2011, 16:40

XEMS

20th Mar 2011, 01:29

Fickle,

Not sure about that. The US Air Force operates approximately 20 PC12's in multiple roles. Some of the missions are in some very inhospitable places. I have a bit over 1,000 hours in a Pilatus, and while I'm not going to get into the multi-single argument, I can say that the PC12 is built stout.

SNS3Guppy

20th Mar 2011, 06:32

This argument would be mute if everyone in here had to take off from Bagdad to Kandahar, knowing that ditching at anytime meant you would get your head cut off on the internet.

I should probably add that there isn't much chance of ditching on a flight between Baghdad and Kandahar. Given that singles are flown in and out of both Baghdad and Kandahar, though generally not between the two, and given that a forced landing really doesn't equate to "getting your head cut off on the internet," one is left to wonder if you've ever made that trip or flown in those locations yourself.

You did say that the conversation would draw quickly to a close if others were forced to make that trip or fly from those locations. I've certainly done it, and don't agree; have you?

His dudeness

20th Mar 2011, 10:23

I´d guess all pro and contra single vs.multiengine had been exchanged.
I also guess that an individual wealthy enough to have to make such a choice is probably intelligent enough to understand them.

Could you please remind me, whats the point in continuing?

theficklefinger

20th Mar 2011, 18:47

There is no debate. Those that have flown planes long enough, have probably been around to have seen a few engines go out on them....but don't take my word for it....

When a PC12 went down in the Sea of Japan, I am pretty sure everyone on board was very happy to only have had one engine, confident that the ditching to ensue really wasn't that big of a deal. And as they sat there in the life rafts freezing to death waiting for the SAR aircraft arrive, they all felt confident that single engine ops were really a great thing.

I wonder if Sully would have liked to have a few more engines before going into the Hudson? Nah....

c53204

22nd Mar 2011, 08:49

The debate rumbles on. If cost/money was not an issue, would we not all prefer/fly multi's?

If a PIC of a twin had an engine failure taxying to take off, he would not take off. Yet millions take off with a single engine, single generator.....

Asked my wife if money no object would she prefer a G550 or 7x - the 7x. Passengers like more engines - but then when has a passengers needs come before profits.

c53204

22nd Mar 2011, 08:54

All Pilatus aircraft are built 'stout'. Problem is Pilatus don't build the noisy fan on the front.

SNS3Guppy

22nd Mar 2011, 20:31

If a PIC of a twin had an engine failure taxying to take off, he would not take off. Yet millions take off with a single engine, single generator.....

You state that a pilot of a multi-engine airplane wouldn't take off with a failed engine, and try to compare that to departing with a single engine or single generator in a single engine airplane? Not even close to apples and oranges, here; you've created a wholly nonsensical statement.

You really can't compare a twin engine airplane attempting to takeoff with assymetrical thrust and an engine failed, to departing in a fully functioning single engine airplane with one generator.

Did you think this out before you made the argument?

supermoix

22nd Mar 2011, 20:33

(When a PC12 went down in the Sea of Japan, I am pretty sure everyone on board was very happy to only have had one engine, confident that the ditching to ensue really wasn't that big of a deal. And as they sat there in the life rafts freezing to death waiting for the SAR aircraft arrive, they all felt confident that single engine ops were really a great thing.)

Nonsense! In a Turbo Commander, the same scenario after an engine failure and feathering the prop in the affected engine the twin will KEEP FLYING at 200 KTAS instead of gliding. thus making it to destination or diverting to a safe landing in another airport. Simple as that.

By the way, in that accident SAR they were never dispatched, they were picked up by a cargo ship. And If a Russian SAR helicopter was going to do the rescue would have been a TWIN engined Mi-8.

formulaben

22nd Mar 2011, 21:20

Supermoix, I think you missed ficklefinger's sarcasm in his post...

supermoix

22nd Mar 2011, 22:36

Ooops! (You're right formulaben).

c53204

23rd Mar 2011, 09:13

The quote came from a CFI in the mid 80's. Think he was trying to get across that millions do/have used single engined aircraft and have faith in them.

I used to go across the channel 2/3 times a week in a Arrow II from Bournemouth and Southampton. You tend to think (at least I did) more about an engine failure once over the water.

SNS3Guppy

23rd Mar 2011, 10:49

The quote came from a CFI in the mid 80's. Think he was trying to get across that millions do/have used single engined aircraft and have faith in them.

If the quote to which you're referring is the statement you made earlier, "If a PIC of a twin had an engine failure taxying to take off, he would not take off. Yet millions take off with a single engine, single generator.....," being in mind that it didn't make any sense when it was first put out there, and makes no more sense today. It's an idiotic statement. Again, whether you're snaking someone else's comment or saying it yourself, the notion that you'd think of comparing taking off in a twin with one engine failed to taking off in a single engine airplane with fully functioning engine and generator, is idiotic at best.

Have you ever flown a multi-engine airplane?

This really does nothing to instill faith in the single, you see.

Such a statement says nothing about the safety of a single, but says poor things about the speaker.

Rodney Ram jet

15th Sep 2014, 03:07

You hit the nail on the head, if you lose
an engine on a multi engine aircraft and
their is no damage or injuries their are
no reports submitted, these are the exact
numbers you need to determine which is
safer a single or twin engine aircraft. I
have personally seen several PT6 turbine
engines fail in flight, luckily they were all
on twin engine equipment and made safe
landings on one engine. I watched a low
time factory overhauled PT6 engine on a
Beech 1900 C model quit 3 times in 2 days
It had a almost undetectable vibration in
the prop gear box at high power settings
which broke the Py air line from the fuel
control unit to the prop gov. The engine
than goes to idle. This is such a prevalent
problem on the PT6 that the Cessna Caravan
has a override detent on the throttle that
dumps unmetered fuel into the engine
to keep it running. The bottom line is
that turbine engines are designed, built
and maintained by men, non of them
are 100 percent reliable.

Rodney Ram jet

15th Sep 2014, 03:32

Their have been 30 PC12s destroyed in accidents
3 of those were engine failures, out of the 200+
Cessna Caravan accidents about 15 percent have
been power lose. I have personally seen several
PT6 turbine engines fail in flight, luckily they
were all twin engine equipment and made safe
landings on one engine. As more people buy
into the sales hype that a single engine turbine
are just as safe as a twin, the numbers of these
aircraft will continue to grow, and the numbers
of these aircraft involved in accidents caused
by power lose will also increase. For what you
will pay for a new PC12 you could have a
refurbished King Air 200 with belly pod to
match the PC12s capacity, and high float
gear to match the PC12s off airport capability.
The KA will do something the PC12 will never
do fly all day long full of people on one engine.
The bottom line is turbine engines are designed.
built and maintained by men it is impossible
for them to be 100 percent reliable.

stilton

15th Sep 2014, 10:16

Mike Tyson used to say 'everyone has a plan until they get hit'

Its the same with a single, no matter how sophisticated, all your planning goes out the door when that one engine dies and there's nowhere to land.

If you're over the ocean, a built up area or any number of other inhospitable places you could pay the ultimate price.

AdamFrisch

6th Oct 2015, 02:18

Sorry to necropost, but it needs to be done for posterity.

Back on topic. A Garrett turbine is about 20-30% more fuel efficient compared to a PT6. So a Turbo Commander with the -10 engine will burn about 380-400pph (that's about 58gal/hr) in total doing 290kts. That's about 100pph, or 14gals less than a PC12. That's having more horsepower and going faster. Overhaul also much cheaper than on the big PT6's. I would say it's a wash between overhauling 2x -10's vs 1x big PT6. So as you can see the myth that a single is always cheaper does not apply here.

Which begs the question - if there's no cost penalty for going faster, save fuel and save on purchase price - wouldn't you rather have a twin?

Flownalot

4th Jun 2017, 16:20

rigpiggy

6th Jun 2017, 15:52

we have a 6100 tbo on -135's. company I used to be at had a 9000 TBO on -67's.

I only have 1000ish on the garretts, but 10K+ on the Pratts. I've shut down 3 p&w's 2 due to oil loss, and one full on S^&t the bed.

I don't fly singles anymore

Bphale113

27th Jun 2017, 18:12

Well I am an old guy and like 2 burning..I have about 5000 hour in every type of turbo Commander built and an 840 (690C) with dash 10s is hard to beat...get one with a Garmin panel and you good to go....bout 300 knots 540 pounds.....now here is the bad part old airplane , parts might be hard to come by....you have to learn to taxi it...I did read someone sad the TPE 331 was finicky well not true just learn to run them....years ago when battery tech wasn't as fine as it is today they could be tricky but today no problems with hot starts.....if it were were me I would buy a Commander......

rigpiggy

9th Jul 2017, 16:14

Put a battery minder on your plane and leave it plugged in between flights will make it last prob 30% longer. 219$ battery minder vs 3800$ battery, easy economics even without taking into account possible engine wear reduction due to cooler starts

AdamFrisch

20th Aug 2017, 05:36

Concorde batteries also last longer than Gill's.

rigpiggy

23rd Jan 2019, 01:49

Just to dredge up the old single vs twin debate

https://www.airlive.net/alert-a-massive-search-operation-is-underway-after-a-piper-malibu-disappeared-from-radar-near-the-english-channel/

formulaben

23rd Jan 2019, 02:01

abezzi

23rd Jan 2019, 06:38

Sadly, this may be the case in the above. :(

Does somebody knows if this Malibu was a piston model or a Malibu Meridian, a turboprop? Can make a big difference...

rigpiggy

23rd Jan 2019, 13:03

They show the turboprop, but all of them are PA46's. Wrt continental, lycoming or pratt. Which am i happier with, well the pratt. But I'd be happier still with 2 of them

abezzi

23rd Jan 2019, 13:36

They show the turboprop, but all of them are PA46's. Wrt continental, lycoming or pratt. Which am i happier with, well the pratt. But I'd be happier still with 2 of them
I'll be happier with 3 of them, but I believe that flying a single turbine at night in IMC is something different than flying a piston...

DownWest

23rd Jan 2019, 16:55

Does somebody knows if this Malibu was a piston model or a Malibu Meridian, a turboprop? Can make a big difference...
Piston. It was a 310.

rigpiggy

25th Jan 2019, 03:36

Makes no difference, if the engine dies, your still up fecal matter creek, without a muscle/water power transformer

Double Back

25th Jan 2019, 09:17

Interesting thread, learned a lot.
But coming back to the TS, if I would start a thread like this I would be more active, especially asking a few guys here who clearly have experience.
And at least have the dignity to report somewhere in the thread what choice was made, IF any was made....
I bet it was some SIM pilot youngster... :)

Lanrod

4th Jul 2019, 18:11

I stumbled across this, and it made me smile. I have about 2000 hrs in Turbo-Commanders (primarily the 695B) and about 300 in the PC-12. Both are great airplanes. As previously noted, the PC-12 is very roomy, modern, and nice (but ours did not have a potty). The Commander is more like a Corvette, but still carries several passengers and has a potty (but not very private). The government was footing all the maintenance costs, so at the time I was not thinking of it from an owner's point of view.

From a typical cruise speed perspective, the Commander wins by about 40 knots. The ceiling for the Pilatus is 30,000 (but flight levels only allow for 290), while the Commander can move up to FL350 when needed. Strictly from the safety perspective, the Commander is definitely the winner. It can fly single engine anywhere. When giving instruction to pilots new to the Commander, we would shut down one engine, and fly with the gear down at 16,000' - so single engine capability is amazing!

EverelAirborne

4th Jan 2024, 14:03

We own a 1981 Turbo Commander 1000 (695A) and have now 300 hours on it, and we have taken it across the Atlantic both ways. I spent 4 years researching the best airplane for our particular missions. We regularly fly more than 1,000 NM East and West over the Rockies. Private use only - owner pilot. Enough space for me, a 6' 2" big guy at 300 lbs with O legs. On-board lav. Reasonable economics.

I have looked at all the VLJs, all the single engine turbo props and the multi engine turbo props. Again and again I came back to the Commander 1000. The VLJs are too small for me and have short legs. The new Single Engine Turbo props like the Eclipse, the TBM, the PC 12 are outrageously expensive at $ 5 mill plus. The Piper Cheyenne is not supported, almost impossible to get a low time Cessna Conquest and the King Airs are way overpriced, at least 2x the Commander. In the end we went for a low time Commander 1000 with a Garmin G600 glass cockpit, dual GTN 750s with a modern Genesys (S-Tec) 3100 autopilot. We upgraded to the 5 blade MT props. All in $ 2 million.

Of course , we are biased, but I have to say we LOVE the Commander 1000. It never left us stranded. We can fly for 6 hours and go 1,500+ NM, if the misson calls for it. The aircraft and the Honeywell (Garrett) TPE 331-10 engines are very efficient and very reliable. The TPE 331 has been built by the 10s of thousands and is still in production, especially for the military (drones). At regular cruise of 285 kts to 290kts we burn 70 gal of JetA (for both engines). We can take advantage of tail winds up to FL 350 and we can stay low at 4,500 ft to avoid the headwinds without loosing too much range. When I push back the pilot seat, my legs won't touch the pedals and my knees are roaming freely. Try that in a Phenom or a Mustang or a TBM...

The 5 blade composite props are significantly lighter than the 3 blade metal props. In addition to the weight savings, that means start up of the engines is a lot quicker and easier on the batteries. Since I have the new props, I never had to use an external power source (GPU) for starting the engines. Temperatures during start up are also lower. In terms of performance, acceleration, take off and climb perfromance is about 15% improved. No impact on cruise performance. And of ocourse they are much quieter and produce less vobration.

In terms of support, Twin Commander Aircraft company supports the type certificate and part supply. There are service centers in IN, IL, OK, and OR. Commanders have been exported around the world and you will always find knowledgable people even internationally and the TPE 331 is well supported.

Every mission has the perfect airplane. For our missions, the Commander is the perfect airplane at "reasonable" cost.