a guy flying a control line plane with finesse. I have one question, on the nobler (TH has it ) what are the ailerons used for ? or are the controllable ?

They are flaps actually.

They are coupled to the elevator. When the elevator moves one direction, the flaps move the other. It's how CL stunters can turn so sharply.

Thanks I understand I think. But I will definitely ask the guy I saw flying his CL plane next time I see him.

As da Rock said, they're flaps kind of like some RC models have flaps for slow landings where they give extra lift to the wing but coupled directly to the control system. Because the stunt pattern calls for very sharp turns for some manoeuvres the normal wing loading simply runs out of lift and the model will stall in those turns. Deflecting the flaps far enough gives the extra lift needed to keep it away from a stall and fly smoothly through the corner.

Also for future reference, the flaps on a stunt ship like he was flying always move opposite of the elevator. Every time the elevator goes up, the flaps go down.

By the way, go visit this flyer, he will, be glad you did. Maybe you both can fly some together and you can have a new modeling friend and he will too. Appreciation goes both ways and who knows both of you may learn from each other.

Robert

The short explaination: variable camber wing.

Jim