Thrust Angles on Pushers

In this video i explain thrust angles and how to know what angle your motor should be at(:

Basically, you want to make sure that your motor’s center of thrust goes directly through your aircraft’s center of gravity, which is on top of the wing.

In affect, moving the motor farther towards the rear of the plane reduces the amount of down angle needed when the motor is mounted high on a pylon, like this

Before I knew about thrust angles, i Mounted the motor up high on a pylon for prop clearance. Unknowingly, i created a large lever that wanted to push the plane down/flip it forward. To try and fix this, i added down angle as shown above. It still didn’t work, and i then realized that the thrust must go through the CG. I fixed the problem by lowering the motor into the thrust centerline.