I have an old Ugly Stik that I bought from a guy who built it over ten years ago. It had been sitting in his son's barn since then. It had never flown even though it had all the servos, receiver, and battery installed.

I replaced the receiver with a new Spektrum and replaced the battery with a new NiMh. Everything is mounted about as far forward as possible.

The wing span is 58-1/2". I had intended to use an OS 46AX engine, but once I mounted the engine, as far forward as possible, the plane was very tail heavy (I set the CG at 3-3/4" from the LE as per instructions on the new Great Planes 40-size stik). I assume that plane is similar to mine.

The thing needed 12 ounces of lead in the nose to balance. That makes it weigh 8-1/4 pounds.

So, will the OS 46AX be strong enough to fly this thing?
Or, should I try my TSI 75 engine instead?

Jack