Hi guys - I am starting the build of a Top Flite Giant Scale Corsair and am determined if possible to power it with a Radial! I'm currently looking at the 7-77 or even 9-99 UMS engines but diameter is an issue especaially with the 9-99.

With an estimated weight of around 30lb I am concerned that the 7-77 which may fit does not quite have the power.

I'm looking to acheive ascale flight envelope with a three or evenfour,if I can,blade prop.

I will be following this thread with interest and would appreciate your thoughts.

Dave