Interference Continued...

So, the battle to get the Tiger Moth in the air, without interference or problems, continues.

Can I just say the guys @ Toyworld have been sensational in trying to help me track down the problem, have given me plenty of their time and lent me some gear to try and diagnose the problem.

I've been round and round the mulberry bush on this one. Yesterday I finally though I had it figured out after I replaced the Electrafun servos (in the TM) with some cheap replacements on loan from Toyworld.

When I tested it, with the lower wing off (and hence one more servo not in the chain) it seemed good up to quite large distances. But today, when I took it to the field I started getting jitter in the rudder at only 15 yards or so. I put the plane up but the flight did not go well (see flight log) - a reasonable landing was organised given the circumstances with no significant damage but there is not doubt in my mind that the Moth was not responding properly to my control inputs suggesting jitter was making the thing more or less unflyable. Also should note had big throw on control surfaces, but this is something you can compensate for with the transmitter by being delicate on the sticks, and I was. The problem looked exactly like certain control surfaces - rudder in particular - being flicked quickly in one direction.

I'm going to disconnect the airleron servo which wasn't present the other day and see if I get a different result. If I do I think there are two possibilities.

1. The airleron servo is faulty - unlikely, it is new and wasn't cheap.
2. Leading back to a theory we are considering but not currently investigating - the 7.2volt LiIon battery might just not have enough volts to run the receiver, 3 servos and the engine cleanly.

When we do sort this problem out I will try and give you a run down on what (if anything) I have learnt about trouble shooting problems with RC planes.