Jim Branaum

My Feedback: (3)

Glad to hear that! I have been way too busy with friends and family health issues to deal with mine (which is 4th down on the fix it list), but its day will come. It is on a Challenger (1-800-COLLECT). Going to have to think about the Weeks Solution - probably should build it pretty soon.

MFIGHT43

Ok guys. The carb conversion is going well. I seem to have the mixture just perfect. Here's my new dilemma. I currently have a 24x10 prop on it, which is on the bottom of the recommended range. However, I can only get the motor to tach at 6500-6700 rpms. I believe the manual says you should aim for about 8200-8300. What are you guys running?

computermonkey

My Feedback: (90)

This is what my 3W 75i is doing. Mejzlik 24x10 6800rpm, JC super prop 25x10 6200rpm, 3W 26x11 5500rpm.

I would not turn this engine in the 8k due to vibration etc. 24x10 would be the smallest prop I would use. It runs very strong in the 5 to 6k range. You will love the performance.

Truckracer

My Feedback: (19)

+1, I couldn't imagine that engine turning over 7000 range, much less in the 8000 range.

MFIGHT43

ok, I see that less is more with this motor. I'm swinging a Falcon CF 24x10 @ 6500, and a 3W wood 24x10 also at 6500.

Truckracer

My Feedback: (19)

That sounds like a good RPM range to be in with that engine.

MFIGHT43

Thanks everyone for the advice! I guess I should have known it was just fine considering it pulls a 26.5 biplane for nearly unlimited vertical!

computermonkey

My Feedback: (90)

Roger that