I just got a Nexstar, and it can use up to a .51 engine, so I want to put a SuperTigre .51 in it. My question is: can I put this engine in another .40 size plane (my second plane) if it is rated for up to a .46? Tower's site says "the .51 is for adding some extra kick to you .40 size plane for increased climbs, snaps, etc."

I like the larger size because I plan on using 6 channels with 6 servos in the future, for flaps and ailerons, etc.

Thanks.