Chuck wrote:

Paul, you asked about my new throttle body I added. I machined it from a
block of 6061. 2-3/4" bore. I used 3" SCAT to the inlet scoop. It is
connected to operate as a secondary port, opening above 3/4 throttle. I kept
the original one as a primary because it has an air filter. It did make a
noticeable difference in takeoff power, but I can't make valid tests in this
desert heat because now I cannot keep full throttle in long enough to do max
performance climb tests or the water temp overheats. No difference in full
throttle cruise speed at altitude, where cooling is not a problem, I suppose
my ugly inlet duct is too draggy. If you change one thing you have to change
10 others! :-)

Chuck Dunlap

Wow that looks like it will do the job Chuck. A BIG hammer.
Are you sure you are not too lean. Hmmmmmmm....detonation?  Broken spark plugs?

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org