Perry, just wondering if you know fuel burn at full throttle.  If

the engine

is tuned well (good Ve), it can burn double the fuel rate you

mentioned at

5000 - 5300 at full throttle.  I'm assuming that you are well below

WOT at

5300?

Tracy Crook

No I don't, I guess that's where a fuel flow monitor be a nice thing

to

have.  No, not well below WOT at 5300.
WOT was 5500 before the recent mods, down to about 5400 now.  The mods
are going well to shorten the runners, so we'll see if I can get some

of

that back. I mainly want the power back for climb.  Climb RPM at 90
knots decreased from 5200 to 5100 and it is noticable.

--
Perry Mick

Tracy I might add that Perry is using the stock computer and mass

airflow

sensor so he has no direct control over the mixture in case you were

thinking

of a conventional aircraft system. Is that still correct Perry?

Paul Lamar

Yes it's true, I have a fake FADEC. Also, if the engine was capable of
large fuel consumption, wouldn't that also indicate it would be capable
of high HP output?  My engine just isn't putting out that much HP.  If I
did the calcs right 6.5 gph is 87 HP and 7.5 gph is 100 HP.  If my
engine is capable of 120 HP max, that would be a max burn rate of 9 gph
- consistent with observations.

If it was actually burning double-rate WOT, 15 gph --> 200 HP, that's
not what I'm experiencing!

Perry Mick

I think you can trick the stock computer into running a bit
richer if you disconnect the water temp sensor from the computer
and simulate a cold engine by hooking up some sort of
pot circuit that emulates the temp sensor.


Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2003 All world wide rights reserved.