alright guys and girls give me some help i have a hobbico im flying for awhile now takes off fine and somewhat of a short distance. i floated it in the other day and pretty hard landing hit once on wheels then nosed over broke a prop and that was it. took theplane back put another 10x7 prop on and checked the plane over no damage checked it over good. taxied out and it would not take off the ground so brought it back put a tach on the engine and at full throttle getting around 11,500 to 12,000 rpms so some of the other guys took alook at it and said looks fine we took it back out and held the tail of the plane went to full power and let it go and applied small amounts of up elevator finally i was a full up elevator before it took off so i brought it back around and landed it and it sits in my shop now im dumb founded at what could be wrong all servos are fine, and the guys around the fild say the engine rpms are fine so what gives anybody know thanks mike