Karol - Thanks for the suggestion . . yes I was thinking about RCGF 20cc and as per the feedback, the only problem is the weight . . secondly when I look at the Epic Kit, it seems that the plane can be controlled with a 90size engine .  To be fair, I am considering RCGF 15cc engine ... I think it is lesser in weight and will have enough power for the plane. here is the engine

http://www.youtube.com/watch?v=qzRsv5QUfY8

please suggest me  - -  should I order for this engine