Hi,
a few years ago, I was given this Old Timer. No info on it, no engine. Now, I want to get my 11yr old involved... perfect platform!

Here are the specs:
- 50in wingspan
- 425 sq in
- 33 oz

I gave it the following combination:
- Trinity Quartz 19T
- Master Airscrew 2.5:1 Gearbox
- 9 x 6
- Electrifly C-20 ESC
- 6 x 800AR
- 2 micro servos
- standard receiver

Thanks to motocalc, the power combination is perfect! Slow plane fine for a beginner, but enough power to recover from a mistake.

Here are the problems I need your help with:
- full throttle requires full down trim. idle require little up trim. I believe I have enough down thrust (see picture), so CG might be too far back (?).
- Rudder needs to go full range to actually turn. I am now limited by the elevator getting in the way.

So the questions I have for you:
- Do you recognize this model? Seems to be plan / scratch built
- Where does the CG need to be? I have it at ~30%
- What down thrust should I have?
- How do I solve the rudder issue? More rudder surface?

I the current state, I can't give my son the controls... to his biggest disappointment!

Thanks

-Fred