We are finding it a bit difficult to set the mixture using
Tracy's computer on the dyno. In an aircraft at low altitude there is
a much simpler set of situations where intake manifold pressure
is strictly a function of throttle opening. On a dyno
the load can be varied over a wide range. Tracy's in the air method
of setting the map works quite well but it is less well suited
to a dyno situation.

Never the less we got one useful data point where the throttle
was 3/4 open at 5250 and intake air temp of 84 degrees F.
The HP was 148. BSFC was .53 and EGTs were 1402 and 1477.
EGTs were down about 100 F from peak 1532 and 1580
The air:fuel mixture was about 15:1
Unfortunately the mixture knob was set to full rich at that point.
We were using the default mixture settings.

Frankly I am not entirely sure what we are going to do next.

Paul Lamar


The Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
Copyright 1998-2005 All world wide rights reserved.