fadi81, on the landing speed; If you check the cg and the nose drops down by more than 1 1/2" then you are more nose heavy than you need to be. This will increase your landing speed. As you found out the 4*- 40 needs to slow down big time in order to lose altitude on its own. As you found out if the plane has any speed at all it would rather cruise along rather than lose altitude. YOu are running a 11-6 prop. I would switch to an 11-5 which will give you a slower speed at idle. I hope these ideas help. [8D]