Airplanes

To make your plane roll more axially, make sure the aileron throw is equal up and down on one half of the wing. To do this measure the throw with the ailerons deflected all the way to one side. Then measure the distance between the end of aileron, and the wing. Deflect the ailerons the other direction all the way, and measure the distance again. Make adjustments in the radio, if you have a computer radio, to get these deflections the same.

Do I need differential? A good way to check to see if you need differential is to fly the plane

towards you, and pull the airplane into a vertical climb. Relax all the controls, then do a half roll

on the same vertical up line. If there is no heading change, LEAVE IT ALONE! If the model veers

to the left, after a right roll, for example, you need to increase the differential. If the heading changes

in the direction of the roll, then you need to decrease the differential

Do I need to change the engine thrust line? If you pull the airplane to a vertical up-line and relax the controls, what does it do? If the airplane pulls to the left, with the top facing you, you should add more right thrust to the plane. To do this, simply shim the engine, or engine mount with a spacer to increase the amount of right thrust. If the plane pulls to the right, then reverse the process. The end result it to have the plane go as straight as possible on the up lines.

The same goes for up/down thrust on the engine. If the plane pulls to the belly on the up line, then increase the amount of up-thrust in the engine, and vice versa if it goes to the canopy.

Note! It won't take very much change of the thrust to make a difference, so "sneak" up on it!

How come when I do a snap roll, my plane veers off to the side? A common problem that a lot of pilots have is when they set up their planes, they usually have WAY TOO MUCH throw for a proper snap roll. What happens, is the plane gets buried too deep into the snap, meaning there is too much rotation in the airplane in the pitch and yaw axis. If you're competing, all the judges need to see, is a break or departure of the plane from its flight path. The less the plane yaws and pitches, then the less it'll move off of the flight path. Hint! If you pitch the plane with elevator slightly at the beginning of the snap, it will help the plane from loosing altitude on the exit. This would be "up" elevator on a positive snap from upright, and down elevator, on a negative snap from inverted.