Modifying GP Easy Sport ARF
 

Hello

Giving a test in my Geometry class and I had a thought.

I will be getting a GP Easy Sport .40 ARF soon. I want to modify it by putting a servo in each wing half to take advantage of the flaperon. Any thoughts on this??

Thanx and remember tan = sin / cos

RE: Modifying GP Easy Sport ARF
 

You will need a radio that can give the elevator mix with the flaperons.
When you apply the flaps, the planes goes up. You need the mix to
compensate for that....applying some down elevator. ;)

FBD. :D

RE: Modifying GP Easy Sport ARF
 

I did just that, plus put anhedral in the wing and used an OS .61SF for power. I used 2" ailerons, 3" elevators and 4" rudder. Great flying airplane.

To mount the servos, I cut holes in the wing center section sheeting just past the fuselage. I inset some plywood to screw the servos to and dropped them in.

For the servo mounting, I cut a rectangle of 1/32 ply, then glue on a small piece of 3/32 or 1/16 ply for the servo to screw to. The 1/32 ply goes underneath and reinforces the balsa sheeting on the wing. Glue in a toothpick in the center of the mounting ply. Coat the 1/32 with epoxy and use the toothpick to insert under the wing sheeting through the hole and pull it up against the underside of the wing sheeting. The hole in the wing sheeting has to be large enough for the servo body and the 3/32 mounting ply.

I have used other methods, but this has been the strongest. It also works if you need to add a servo to the rear fuselage or to use a smaller servo in a larger hole.

For the anhedral, invert the dihedral brace and fill in the gap on top of the wing joint with scrap balsa. The anhedral lets the plane do knife edge without rolling out-much nicer than stock.