Paul
My B9EV  and  B10EV plugs just past 100hrs and still

going strong.

Ian.

<snip>

Ian,
I know it 'sounds right' to lean the engine to the no-rpm-drop

point but if

you go a bit further with the leaning, the fuel burn goes down

much faster

than the rpm.  The 2-3 knots of airspeed loss (if at WOT) is a

small price

to pay for the reduced fuel burn.  If not at WOT, just open the

throttle a

bit more to compensate for the lean mixture drop.

Also, do you have a mixture monitor and if so, what is it

reading at your

cruise setting?

Tracy

Tracy, What is your fuel burn, engine or prop rpm, IAS and estimated hp
output at your preferred economy cruise speed.  I believe that I read it
before that you run the engine at around 5000 rpm with a 20 to 1 air/fuel
ratio.  I'm trying to get some numbers to give to a prop manufacturer so
that they can come up with a prop design for the Glastar.  I know that it is
an apples and oranges comparision but knowing what the engine is producing
at a given rpm and a know prop size might be useful in extrapolating
performance numbers for another airplane.

Del Johnson

 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2002 All world wide rights reserved.