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 Post subject: Re: Long live the turboprop !
PostPosted: 13 Aug 2015, 18:51 
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Username Protected wrote:
Adam, do you know any operators who do 2000 mm trips in these aircraft?


No, not really. But it is possible as an extreme. 1500nm is very doable.

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 Post subject: Re: Long live the turboprop !
PostPosted: 13 Aug 2015, 19:00 
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Username Protected wrote:
Adam, do you know any operators who do 2000 mm trips in these aircraft?

I would not expect that generally in zero winds.

Some examples by looking up 695 registrations on flightaware:

1513 nm:
http://flightaware.com/live/flight/N695 ... /KBZN/KCEW

1710nm (but not sure I believe FA on this):
http://flightaware.com/live/flight/N12V ... /KCRQ/KPNS

1264 nm, but took ~6 hours heading east? Why? Longest time enroute I found:
http://flightaware.com/live/flight/N12V ... /KBPT/KCRQ

Vast majority of flights are < 3 hours. Very tiny number > 5 hours. People think they want long range, but when they get it, it isn't often used. So the benefit is a tiny amount of time saved per year, maybe an hour or two.

Mike C.

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 Post subject: Re: Long live the turboprop !
PostPosted: 13 Aug 2015, 19:18 
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Joined: 06/09/09
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Aircraft: C182P, Merlin IIIC
More range capability helps when flying internationally where the stops are longer, costlier and more complicated. The more of them one can avoid the better.


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 Post subject: Re: Long live the turboprop !
PostPosted: 14 Aug 2015, 09:12 
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Joined: 12/15/10
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Location: Burlington VT KBTV
Aircraft: C441 N441WD
Max Nerheim just flew his Conquest 2 from Juneau AK to Scottsdale AZ non stop. 7 hr flight and landed with 580lbs. RVSM helps;)

http://flightaware.com/live/flight/N184 ... /PAJN/KSDL


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 Post subject: Re: Long live the turboprop !
PostPosted: 14 Aug 2015, 09:22 
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Username Protected wrote:
RVSM helps;)

Yes, and so does TPE331 and 300 knots, though the ground speed on this flight is not impressive, suggesting a significant headwind, or using long range cruise power settings. The file speed was 301 knots, though.

Mike C.

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 Post subject: Re: Long live the turboprop !
PostPosted: 14 Aug 2015, 10:19 
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Joined: 11/09/13
Posts: 1910
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Location: KCMA
Aircraft: Aero Commander 980
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The 840 and up models have a completely different wing sitting on top of a very similar fuselage to the 690s. The new wing has no spar AD nor tons of bladders and its longer in length.

The thing that has worried me about Commanders is that they seem subject to fatigue and corrosion problems.

Consider these ADs:

2003-07-03: 690D, 695A, 695B

Inspect and modify, then recurring inspections, of wing and fuselage fatigue locations. FAA estimates worst case cost to comply $233K.

2009-25-02: 690, 690A, 690B

Inspect under wings skins for engine mount beam corrosion. FAA estimate $35K. I've heard this can cost much more in reality.

2006-15-01: 690, 690A, 690B

Inspect for aileron hinge cracks. FAA estimate worst case $17K.

95-12-23: 690C, 695

Inspect repetitively for wing cracks.

94-04-14: 680, 681, 685, 690

More wing crack inspections.

I stopped looking at this point. I don't claim to understand the severity of these ADs, but the number and pattern of occurrence is a bit daunting. It would take some research to fully understand the economic impact of these ADs and assess the potential for future ones.

Perhaps most importantly, a prospective owner needs to model the behavior of the TC holder, TCAC, to see how they treat owners when it comes to imposing inspection requirements and ADs (for example, like Cessna did with SIDs).

Mike C.


This is where doing your homework prior to purchasing helps.

You show 5 ADS over 10 years for 8 different models. The commanders are confusing with the model designation, no doubt.

As an example my model a 695 is covered by just one of these. If you have your plane maintained by a good shop they were already looking at some of these areas.

The 690s have the most ADs but are still a great value and some of them still look like they came off the factory floor.

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 Post subject: Re: Long live the turboprop !
PostPosted: 14 Aug 2015, 18:11 
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Joined: 11/09/13
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Location: KCMA
Aircraft: Aero Commander 980
Username Protected wrote:
The 840 and up models have a completely different wing sitting on top of a very similar fuselage to the 690s. The new wing has no spar AD nor tons of bladders and its longer in length.


Thanks Steve. What about hourly inspections? Is it just an annual, or is it a phase program like the King Airs?

I would need real world range of 1,500 or so. I'm guessing the 840 would be the lowest one that would meet that need? From what I can gather, the 680/690 don't have the range even with the -10s.

Robert


The cheapest way to get big range is to buy a 690 with the slipper tanks or you can add them for 50k. It bumbs capacity up to a little more than the newer models. You would want a 690 that had the -10 conversion IMHO. You loose a little less than 10 knots I have heard.

The newer models have either 425 gallons or 474. Most have the bigger tanks. Range is great but not often needed. In my 421 I would get serious about planning at 1000 miles now its not a consideration at that range.

You only need to get your pencil out after 1500 miles and thats without RVSM.

The view from the cockpit and the back of the airplane is absolutely fantastic.

If you need cargo space stick with the 840 with -10s or 980. They have a very large cargo hold and are considered the hot rods.

The 900 and 1000 takes some of that cargo space and make a back potty room where you could put one guy or a couple kids.

The 1000 has the small cabin window and a higher psi differential of 6.7 and a slightly thicker exterior skin. Personaly I do not like the smaller windows they takes away one of the great things about riding in a commander that huge rear window!

No phase inspections just a annual.

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 Post subject: Re: Long live the turboprop !
PostPosted: 14 Aug 2015, 19:13 
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Username Protected wrote:
More range capability helps when flying internationally where the stops are longer, costlier and more complicated. The more of them one can avoid the better.


Exactly. We forget how easy it is to fly in the US - we can get 100LL everywhere and there's very little hassle. In many parts of Europe, Caribbean, South America, Africa etc, forget 100LL to start with. Add mandatory handling, predatory landing fees, big airport hubris, noise certificates, curtailed opening hours and general unfriendliness and the qualities of the Commander became even more important: the ability to fly past all the nasty airports or countries looking to rob you blind. Additionally, the ability to land at the airport with the least amount of infrastructure (big infrastructure = license to suck you dry).

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 Post subject: Re: Long live the turboprop !
PostPosted: 14 Aug 2015, 19:53 
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Joined: 12/29/10
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Location: Dallas, TX (KADS & KJWY)
Aircraft: T28B,7GCBC,E90
Thanks Steve!

Robert


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 Post subject: Re: Long live the turboprop !
PostPosted: 14 Aug 2015, 20:11 
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Joined: 06/09/09
Posts: 4438
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Aircraft: C182P, Merlin IIIC
Username Protected wrote:
More range capability helps when flying internationally where the stops are longer, costlier and more complicated. The more of them one can avoid the better.


Exactly. We forget how easy it is to fly in the US - we can get 100LL everywhere and there's very little hassle. In many parts of Europe, Caribbean, South America, Africa etc, forget 100LL to start with. Add mandatory handling, predatory landing fees, big airport hubris, noise certificates, curtailed opening hours and general unfriendliness and the qualities of the Commander became even more important: the ability to fly past all the nasty airports or countries looking to rob you blind. Additionally, the ability to land at the airport with the least amount of infrastructure (big infrastructure = license to suck you dry).


Commander does OK but the Merlin does better! :box: :D

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 Post subject: Re: Long live the turboprop !
PostPosted: 15 Aug 2015, 00:33 
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Joined: 12/03/14
Posts: 20763
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Company: Ciholas, Inc
Location: KEHR
Aircraft: C560V
Username Protected wrote:
No phase inspections just a annual.

Technically, that can't be true. Turboprop twins are subject to 91.409(e)/(f) which requires selecting an inspection program, most often the one provided by the manufacturer (TC holder).

Practically, if the manufacturer's program is an annual inspection, regardless of hours flown, and has no other staged events (no 500 hour, 2000 hour etc, items), then it is "just an annual" in effect.

I've never seen a program like that, but it could exist.

Where can I get a copy of the factory inspection program? I'd love to read it and see just how onerous or not it is.

Mike C.

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Last edited on 15 Aug 2015, 01:12, edited 1 time in total.

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 Post subject: Re: Long live the turboprop !
PostPosted: 15 Aug 2015, 00:40 
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Username Protected wrote:
Commander does OK but the Merlin does better!

I get the impression the Commanders are noticeably faster and lighter.

You also don't get a nosebleed trying to get in one as the Merlin has that huge air stair.

I can tell you that some of the elderly folks I fly with simply can't get in a Merlin.

The Merlin is built more sturdily, there is no question about that. Also has way more fuel, 600+ gallons.

Since any owner is an indentured servant to the TC holder when it comes to inspections, parts, and, for the most part, promulgating ADs, it isn't clear to me who treats their operators better, M7 Aero or TCAC. M7 seems to be geared to airline customers with Metros mostly, hence manuals cost a LOT, so I'm leery of how they treat low utilization owner operators.

Mike C.

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 Post subject: Re: Long live the turboprop !
PostPosted: 15 Aug 2015, 01:09 
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Location: Hollywood, Los Angeles, CA
Aircraft: Aerostar Superstar 2
Merlin is the range king. Erwin - I seem to recall you fly somewhere in South America direct to Canada, right?

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 Post subject: Re: Long live the turboprop !
PostPosted: 15 Aug 2015, 07:52 
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Aircraft: C182P, Merlin IIIC
Username Protected wrote:
Commander does OK but the Merlin does better!

I get the impression the Commanders are noticeably faster and lighter.

You also don't get a nosebleed trying to get in one as the Merlin has that huge air stair.

I can tell you that some of the elderly folks I fly with simply can't get in a Merlin.

The Merlin is built more sturdily, there is no question about that. Also has way more fuel, 600+ gallons.

Since any owner is an indentured servant to the TC holder when it comes to inspections, parts, and, for the most part, promulgating ADs, it isn't clear to me who treats their operators better, M7 Aero or TCAC. M7 seems to be geared to airline customers with Metros mostly, hence manuals cost a LOT, so I'm leery of how they treat low utilization owner operators.

Mike C.


The Commanders are smaller aircraft with a significantly tighter cabin, so yes they are lighter. I do not know what the actual block speeds are but I would estimate that we would be looking at differences of minutes on a 1800-2000 nm leg, certainly not hours. I looked at Commanders first but found the cabin/cockpit to tight for my travel plans. The Merlin will break 300 kts at the optimum altitude and temps.

I have flown many octogenarians (some part time wheelchair bound) and none have had trouble getting into the Merlin.

To date, my only dealings with M7 where before purchase when I was educating myself on the type. They never sent me a bill for answering my emails. :D

There is a large support base out there for the type and I have found good help at what I consider to be fair pricing. All outside of M7. I know many private Merlin owners and I don't know of one who deals with M7 on a regular basis.

As to the nose bleeds, they are not a problem if the pre-boarding procedure is followed. It states that one is to stand on a three foot stool to aclimate the body before entering the cabin. If this procedure is not followed then yes, there will be blood all over the interior of the cabin. :lol:

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 Post subject: Re: Long live the turboprop !
PostPosted: 15 Aug 2015, 07:54 
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Aircraft: C182P, Merlin IIIC
Username Protected wrote:
Merlin is the range king. Erwin - I seem to recall you fly somewhere in South America direct to Canada, right?


From SGME to CYQK (4800 nm +/-) in two stops.


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