Sig makes the Sundancer in a 50 size
http://www.sigmfg.com/cgi-bin/dpsmar...FV4.html?E+Sig
I lost the my Kyosho Stearman to a radio problem and find this plane is an honorable replacement, though not a true scale plane. I have a YS 63s with a 13x4 prop in mine, but I believe any 70 four stroke would make in fun to fly. It has a pull-pull rudder and 4 ailerons (2 servos) and plenty of room to work. I found the construction excellent and the plane assembles easily.