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Comanche 400?

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Old 18th May 2015, 06:38
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I've also been told that at the same speed as a 250/260 they burn the same amount of fuel, but when you want to go faster you can.
No, not much faster at all, maybe 5-10 knots. Climbed like a rocket though, and some major pitch changes with power changes (but not much more rudder needed) as I recall. I'd support triadic's comments about hot starts - they could be a real bugger. I saw a PPL set fire to one at Guildford once attempting this.

And I had an engine failure in one - I "blew a pot" during the run-up (good time/place I guess...).

All in all, the 260C was a much sweeter aeroplane.
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Old 18th May 2015, 07:13
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Dora

You are correct. all that extra speed comes at a considerable HP requirement. And yes the IO-540 version is the sweet spot.

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Old 18th May 2015, 08:00
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All in all, the 260C was a much sweeter aeroplane.
I'd go a far as saying possibly one of the best light singles ever built.
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Old 18th May 2015, 08:17
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Cool

Hey Dora, unless there were two at Guildford, I was the Instructor in that start fire.
Student would NOT take advice, saw the puff of flame, let go the starter, put his foot on my N#&$ on the way out, passed me at the speed of light.

Fire went out, consumed the air cleaner, fire crew couldn't find us as there was no longer a fire.

I did a couple of charters in that one, AMI, around April '67

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Old 18th May 2015, 09:04
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but recall somewhere between 15 and 18 gph in those days (??).
Kept a record of fuel flows on a ferry from Lord Howe to Palmerston North, the IO720's installed in QueenAir VH AEQ were returning 14.2 port and 14.5 gph stbd at FL170. The aircraft was then used on the Chathams Island run. The IO720's performed very well on this task.
 
Old 18th May 2015, 09:16
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Bloody hell. What is going on here!
PPRune giving a warm glow, rather than a sense of impending doom of vicious anger!
Things are looking up!
I went for a circuit in a 400 at Coolangatta as a pax in a year I cannot remember at a Bonanza society function. The aircraft was immaculate and was a credit to it's owner (whose name also escapes my aged mind). Have quite a few hours in the the 260C, but still remember the impressive take-off performance of the 400 that day.
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Old 18th May 2015, 09:57
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It is the one time 10lb of sh!t in a 5lb bag actually works.

Beachie….Aged…..c'mon your 50th was only yesterday…..
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Old 18th May 2015, 11:12
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Like **** out of a shanghai
And I thought it was like **** off a shovel
Nothing beats cubes Jaba!
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Old 18th May 2015, 11:18
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Folks,
For my two bob's worth, the Comanche 400 achieved a small increase in TAS for a very large increase in fuel flow, compare to a -260C, otherwise much the same as any Comanche 250/260.

I remember our -260C (first one in Australia- delivered across the pacific by a QF Captain who had not flown anything with less than four engines since his Lincoln conversion in the RAAF) with great affection, pity it got written of in Standard GA Accident Scenario No. 3

The 400, a good example of "hull speed" where the increase in the rate of knots is marginal, despite the extra HP.
Tootle pip!!

PS: If you are going to fly any of them, tight control of IAS on approach is essential to achieving something approximating the book landing field length (including factoring) ---- no carrying 10 kts for Mum and the kids.
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Old 18th May 2015, 11:37
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Indeed. Approach at the low end of the book speeds, full flap with a proper flare. Tiny burst of power in the flare if you've slightly mis-judged it. It was frustrating to watch the +10 (or more!) kt, half flap, brigade drive them on in a 3 point touchdown. The aircraft will drop suddenly and shake the bones if you get it wrong and I can only assume that's why there were so many old wives' tales.
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Old 18th May 2015, 23:07
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Greybeard! No, not you I don't think. I didn't think you ever flew for CFS?

AMI appears in my logbook a few times from December 1965 to February 1966.

As a background, CFS not only had a flying school and charter operation, but they also bought and sold aircraft. They had a constantly changing fleet of "trade-ins", which is how we acquired AMI. Our manager, the irascible A-Mac, never one to hide his feelings, had a real "set" against the Comanche 400. So when the hapless PPL set fire to it (adjacent to the MMA Bellman hangars at Perth Airport) he was first on the scene, got everyone out, made no effort to extinguish the fire but removed the fuel caps and stood well clear! The ensuing argument between him and the firemen was something to behold!

The PPL (initials KP, does this ring a bell?), a nice guy, was undeterred, as I subsequently endorsed him on the B55...

At the risk of (again) going OT, the "trade-ins" were available for staff use (for free, we didn't even have to pay for the fuel!!) - at the time we also had a B33 Debonair (about as under-powered as the 400 was over-powered) which was much preferred by one and all over the 400.
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Old 19th May 2015, 02:48
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Did the 400 have the option of tip tanks?
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Old 19th May 2015, 04:26
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Cool

Dora, yes for a few months I was with CFS Jandakot, did my rating and then got the call from MMA may '67

Your fire was a different one, much more fun and less pain to my parts.

Cheers

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Old 19th May 2015, 05:26
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Sorry Greybeard, my memory ain't what it used to be!

I think AMI was the Comanche 400 that got itself written off in a forced landing at Adelaide Airport c.1979(?).

Another quirk of CFS' ever changing fleet of trade-ins was that a C.182 disappeared and nobody realized this for two months! The Perth Airport staff thought it was at Jandakot while the Jandakot staff thought it was at Perth. It was eventually located abandoned at Orange NSW, so someone got a free transcontinental flight...
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Old 19th May 2015, 06:15
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Oklahoma to Missouri at 170kts 9000' in 1983. Wont get that out of a 260 B or C. I agree the 260C is a real mans aeroplane. I think Jim Conrad still holds the speed record for a 400 at 180+.
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Old 19th May 2015, 07:11
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Is that 180kts IAS or TAS?
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Old 19th May 2015, 07:19
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I think Jim Conrad still holds the speed record for a 400 at 180+.
Woulld that be Max Conrad?
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Old 19th May 2015, 09:37
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TAS/CAS

TAS/CAS Jab. The IO720's seriously unreliable. BIG wallet is a pre requisite.
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Old 19th May 2015, 09:39
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Sure

Ha ha Comanchie... Tetchy, overrated and a maintenance black hole. There's stuff around with a lot less than 400HP that will do better with wheels sticking out ....

Sure but we're talkin' 1964!!
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Old 19th May 2015, 09:46
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PA24 400

FWIW Jimmy Hazelton bought Ernie Mills EDM out and most of the other (very few) 400's that came to Oz. Cant remember the number but there were not that many made.
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