At one time the plans for the voodoo were half size. You could build a half size voodoo for 1/2As from the plans. Quite a few folks did that to fly 1/2A combat. In the sixties when Will Rogers flew with us we had a 1/2A combat contest in Baton Rouge. Will was flying a 1/2 size voodoo with a TD .051 on it fueled with a small pacifier tank. Covered with silk it was a great little plane.