Norm, the original design of the plane is 0-0 engine thrust. Because of this problem I have changed it to 2.5 degrees right and 1 degree down and this change made no difference in the sudden left turn during take-off.

Evan, I must use 50% to 60% power or else I can never get the plane into the air. If I apply power to quickly the plane will do a 180 ground loop and come back at me.

The weather here had been rainy the past few days so no chance to try out my theory.

Oldbob