Thanks Tianci. Couple good conclusions I will derive for myself immediately. Surely batteries will go cheaper and the other very important thing to mention seems to me the vibrartions, which might permit lighter construction of the plane, and of course the mentioned number of possibilities for enginnering compormise with KV-vs-Propeller-etc. Anyway, I am concerned about F3A because that is a very demanding class and while almost any other RC plave could fly electric, F3A needs lot more than emotions to get it developed right indeed. Still I wander if someone in F3A could give real comparative numbers about his real experience. [sm=wink_smile.gif]