Mailing List flyrotary@lancaironline.net Message #33002
From: Tracy Crook <lors01@msn.com>
Subject: Re: [FlyRotary] Re: Turbo / cruise altitudes
Date: Tue, 1 Aug 2006 15:42:00 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
FWIW, I cruised at altitudes between 13,500 and 16,500 all the way to and from Osh this year.  Total time 'on the bottle' was 12 hours.  Used up about 1/3 of a 22 CF Ox tank.   Up to 16,500 I never feel the need or desire for more power.  Above that the engine starts to feel a little tired but still had > 300 fpm climb rate there.   Highest altitude tried so far was 19,500 which was probably the highest usable cruise altitude.  Not really usable to me anyway since that is class A airspace. 
 
The best thing about the higher altitude cruise was the really good MPG displayed on the EM2 (>30 mpg)    Of course I would go faster but mpg would not be near that good if I used a turbo.   Price of gas is starting to make it somewhat more important!  Every gas stop was about $100 this year but every one was a C note well spent : )
 
Tracy
----- Original Message -----
Sent: Friday, July 28, 2006 11:44 AM
Subject: [FlyRotary] Re: Test

I'm also toying with this decision, but fortunately in my case I have
plenty of time to make up my mind. The thing that keeps rattling around
in my head is that the Cozy I'm building was really intended to fly
high. I see pilots talking about exactly what altitude they start their
oxygen, and it adds fuel to my turbo fire.

What I haven't been able to quantify is exactly how beneficial the turbo
is in this case - normalization. It seems you can calculate the numbers
to support either argument, and you have to weigh your goals against the
pros and cons of either decision. Sometimes choice is a bad thing.

I guess, in the end, I will probably install a T04 mainly because I'm
following closely in John Slade's footsteps, and so far his T04 is
working out. I have enough time to watch how it continues to perform as
he builds up more hours on it. So far it seems promising. Eyes and minds
open, I guess.

Regards,
Chad

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