I have a Hawk Sky that has a pusher prop and the motor appears to me mounted about 5 degrees towards the ground? I have built a Flying Wing and I am not certain what angle to mount the motor and in what direction? It does seem if the motor is pointed up the plane would fly up? Not so with the HawkSky? Please ck my drawing and give me advice. Thanx!
The Hawk sky and flying wing would be completely different to set up, the prop on your drawing will cause a pusher to nose down and if fitted to a Bixler or Hawk Sky it would be impossible to launch because of violent pitching down.
The reason the HS motor is pointing down toward the CG on the wing is because if it were straight it would force the nose down violently under power.
All those Bixler and Hawk Sky type high mounted pushers have the motor mounted pointing at the COG to prevent nose diving.
I have found the best place to mount a motor on a flying wing is on the centerline of the wing. All flying wings need reflex to fly so keeping the motor neutral helps, if the plane zooms you can dial in some down on the motor.
The reason the Horten 7 had the props pointing behind the CoG was because the motors were buried in the wing to keep the drag to a minimum and that was the only way to do it.
I have a Skywalker Falcon and the motor is mounted above the wing, this makes the plane pretty well balanced during flight but tends to push the nose down when launching due to lack of speed and lift.