I'm not sure if this Plane can be considered 1/2a, but I sure like it.
Dare makes a B17 that looks really nice designed to run on 4 speed 400 motors they seem to be about equal to the norvel 074 this one would be great to convert to 4 of the norvel engines if possible. anyway take a look.
http://www.darehobby.com/B-17_Flying_Fortress.htm
Randy (Digger) Birt