I picked up a Ringmaster Jr. at a yard sale some time back, (ok, it was 5 or 6 years ago) and I'm finally doing something with it.

The PO must have had a chain saw motor up front because he had 1.8 oz. of lead on the tail!

I mounted up a Fox 15 slant head I had around and now I need to know where the recommended CG should be.

Also, how much time do you suppose I'll get out of a 3/4 oz. tank? It's all I had that was close.

Here's a link to a PDF plan of the RM Jr.

http://image2-3.rcuniverse.com/e1/fo...14/Rl25731.pdf

I plan to build one someday.




Mike

Perfect, thanks.

"Also, how much time do you suppose I'll get out of a 3/4 oz. tank? It's all I had that was close."

I'm not really sure. The answer has many variables. Peak RPMs, Prop diameter and pitch, overall engine efficiancy and to some degree altitude, ambient temperature nitro content, oil content, age of the fuel...

Lets just say that you will want a larger tank soon but this will get you started.

Robert