mine was built with a OS91 4st you could fit a 120 in there but the head will be sticking out quite a bit, one advantage would be to not need as much weight up front to balance,
I have considered putting a 120 in mine since I have a extra engine laying around I just havent had the time or desire to fiddle with it,another thing is fuel tank space I would need to open up the front area for a larger fuel tank the one I have in the plane is pretty small and would not give much flight time.
mine comes in at about 10lbs I have wanted to dump the wire push rods as well for a lighter version there are several things I would do differently if I were to build another one of these
Last edited by bigtim; 01-20-2014 at 01:29 PM.