Was it the restrictive air filter? No. Was it tuning? No. Was it
a restrictive exhaust? No. Was it the stupid $@%^& spring that I
used to pull the throttle open in case of a broken  cable? Uh
-huh!  Re-configured it, now, instead of getting 4400 RPM and
- 100 hp, I get 5600 and 190 hp on a static ground run. The
- brakes can barely hold the plane back at full throttle on
- pavement.


Next flight should be on Tuesday.


Brian Trubee

Is this the spring Brian?
How are you determining the HP?

Paul Lamar


Yes, that is the offending spring, except that I had it mounted
on a bracket postioned at the junction of the PSRU body
and PSRU mount plate. At full contraction of the spring,
it acted as a throttle limiting stop.

I re- configured and now get un-restricted throttle opening.

Brian Trubee