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Rusty is right (especially about the cheap bastard part). I run lean
of peak even for takeoff unless I have a short runway with obstacles to
clear. So far, I even race LOP. I was 3 GPH lean of best power
setting during last year's Sun 100.
On those rare occasions when I use it, I don't rely on a mixture
monitor or EGTs for maximum power setting. If you have ever run a model
airplane engine you are familiar with what I do. I twist the EC2 mixture
control and listen for maximum rev point. Nothing is more accurate,
faster (or easier).
Tracy (EM2 fuel flow calibrated in $ per hour)
Hi Rusty,
OK, here is the question that still seems
to have an ambiguous answer.
For HIGH POWER settings, should I run rich of
peak, and if so, how much?
This would be for takeoff and climb.
Bill's previous response seemed to
imply that running at stoichiometric
mixture would maximize power.
(I'm assuming stoichiometric would be peak
EGT.) You are saying I
should be a little richer I believe. I'm
not concerned with the
economy setting, just the maximum performance
settings. I think the
piston engines will detonate if the mixture is
too lean, especially at
high power settings.
Sorry for belaboring
the point, but I really want to know. :) Where
do you actual
rotary fliers set your EGT for TO?
Thanks,
Bob W. (rotary wanabe,
Corona in the fridge)
On Wed, 9 Mar 2005 21:30:32
-0600
"Russell Duffy" <13brv3@bellsouth.net>
wrote:
> So my belief that I need to run richer for the high power
settings on the
> rotary is incorrect?
>
>
>
Hi Bob,
>
> With all engines, it it true that best power is
richer than 14.7 AFR. Best
> economy is leaner. Tracy tends
to be... how shall I put this, "a cheap
> bastard" when it comes to
cruise settings :-) Rest assured, he ain't
> running best
power unless he's racing, and probably not even then.
>
> Cheers,
> Rusty (fearing the wrath of the cheap bastard,
especially after Ed drinks
> all his beer)
>
--
http://www.bob-white.com
N93BD - Rotary
Powered BD-4 (real soon)
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