How to adjust angle of attack?

[Pappa Goat]

I'm flying YAP's A-1H. It has a superb flight model in terms of yaw and torque, however there is one main problem... the aircraft flies so that its wings have an angle of attack of 0 degrees, in other words run flatly parallel to the ground, so that the nose is pointing down slightly. Once more, whilst flying like this with the level autopilot on, the aircraft still slowly gains altitude.

 

 

Anyone know how to handle this?

Edited May 26, 2011 by Pappa Goat

[+Wrench]

recenter the CG???

[+Fubar512]

Xmac position at that airspeed, Cla, Cl0, to name just a few. Unless you have a grasp of what you're doing, and of the complex interrelations between the various lift surfaces, I'd leave it alone.