I recently piked up a .40 sized GP Extra 300 and was wondering if it could perform IMAC patterns?

I have two of the GP extra 300S airplanes one with an os .91 fs and one with a saito 100 fs.

First the airplanes will perform the imac sequences quite well but won't 3d very well(my opinion).
I think the control surfaces are too small(again my opionion).

The GP extra 300s 40 size airplane will perform quite precisely and is alot of fun to fly.
Don't try and slow it down too much on landings or you will stall it.

What engine are you going to use? how much does it weigh?

You can fly the pattern with that plane but you will need something bigger to present a better routine to the judges.

Mr G, I just ordered a O.S .46 AX. No clue how much it weighs yet. Right now its still pretty empty but when I get all my electronics in it I will be sure to get back to you.