Megatech J3 Cub 25 Manual
 

Hi everyone.
I've been reading this forum for years but this is my first post. You folks are so knowledgeable I usually find the answer with a quick search. I have a Megatech J3 Cub 25. It’s been sitting around for years and I misplaced the manual. The plane is ready to fly but I need to set the control throws and balance. I set the balance at 25% of the MAC but I would feel better if it could be confirmed. If anyone has this manual I would be greatly appreciative for this information. Thanks.

RE: Megatech J3 Cub 25 Manual
 

Sorry! Not Megatech... Actually it's a Global J3 Cub 25 ARF. Modeltech makes one just like it -- probably the same maker.

RE: Megatech J3 Cub 25 Manual
 

Hey, you know I have a manual laying around the house...lol
I can give you the throws and CG next time I see you at the park or e-mail them to you.;)
It'd be cool to see 2 in the air...must get pics ! (I'd post them now but I'm at work[8D])

The other Steve:)

RE: Megatech J3 Cub 25 Manual
 

Thanks Steve, that would be great. That plane has been sitting around long enough, it needs to fly! As soon as the field dries out I'll give it a try. I flew my GP 40 Cub the other day and had a bit of a scare. Don't know if I had a radio hit or what but I lost control for a few seconds. I'm going to change that old receiver, it's about 12 years old, with the one in the Global cub. I think I'll give that new Berg 7 ch. a try in the little cub.

RE: Megatech J3 Cub 25 Manual
 

I've been really happy with all my Berg Rx's, should work great.

Here's the CG and throws per the manual:

CG: 1 and 7/8ths inches from the leading edge. My cub is slightly nose down at this point. Manual states not to deviate any more than 1/4 inch forward or aft of that CG. Max aft CG 2 and 1/8ths inches from leading edge of wing at fuselage sides.

Throws: Elevator: 3/8ths of an inch up and down low rates, 1/2 inch high rates.
Ailerons: 1/4 inch low rates, 3/8ths, high rates
Rudder: 3/4 inch low rates, 1 inch high rates

All those measurements for throws are each way, not total travel. So that would be 3/8ths up and 3/8ths down on the elevator for example.

RE: Megatech J3 Cub 25 Manual
 

Thanks again Steve. That ought to get me into the air.