Like a flash the youth pulled the control lever back.

“Too far; lessen the angle.”

He promptly obeyed.

“Volplane!”

Harvey pushed the lever forward, but not too far.

“Quite well; go to the right.”

The youth started to shift the rear rudder with his feet and smiled.

“That is hard work.”

“Why?”

“Because of the gyroscopic action of the propeller; it is much better to turn to the left, though I suppose one can manage a long turn to the right.”