I tried a Maiden flight on a 10 1/2 pound Stearman plane.On take off after the tail came up I let it build up a right bit of speed before I gave it a little elevator.It took off Ok but there was no climb out.It acted like I did not have power.The engine I am using is in Great Running shape.Before I tell you what it is I wanted to heard what engine Alot of you folks would of used.The engine is a 2 stroke So what size engine should I be using Thanks MJ