Steve27597

I picked up what I think is an Andrews Sportmaster.. I have put an OS 65AX on it and gotten it ready for flight, but is seems tail heavy. I have seen the plans in this forum, but I can not tell what the measurement is from the LE. Can anyone tell be how far back the CG is?
Thanks,
Steve

All Day Dan

My Feedback: (5)

Put the CG at 30% of the chord behind the leading edge. Dan.

http://www.outerzone.co.uk/plan_details.asp?ID=2845

Steve27597

Thanks Dan. I ended up adding some weight to the front and will see how it flies.
-Steve

karolh

Don't forget to mention how the maiden flight went.

Truckracer

My Feedback: (19)

The plans show 4" from LE but from experience, it isn't critical. I still have a Sportmaster in the hanger.

Wing is constant chord @ 12" so I guess that puts the CG at 33.3%. The fairly standard 30% as Dan suggested would work just fine.