Jaka,

I chose the OS40FX's over the OS46FX's for that reason. The manufacturer recommends that size to give you options like engine out situations. I admit I'm new to twins but certainly not to modelling and I agree with you that the tendency is to over-power which is something I choose not to do. I really don't think that flying on the edge is a good idea either and like I said in a previous post, you can always limit power on the transmitter but I certainly don't intend to fly this plane like an over-powered sport plane. There are some compromises to be made here. I am building a Twinstar as a trainer and I chose two OS25LA's to power the plane because the consensus was that the plane would fly on 15's but if you had an engine out a .15 would just not be enough to maintain altitude and get you back to the field. Even the original DC2/3 had more than enough power. The airlines were used to tri-motor airplanes for transporting passengers and that is what they asked Donald Douglas to design. He came back with a twin that would do the job and he proved it by overloading it and flying it over mountains, consequently the airlines bought the idea of a twin and the rest is history. He would have never sold the plane if it was just powerful enough to do the job but not handle situations that might have arisen.

Regards,
Andy