1970's Flying Wing

I remember building a RC flying wing kit in the 70's that used a 40 to 60 engine with a foam core wing covered with cardboard, an engine mount made of 1/2 inch maple and 2 end plates made from 1/4 plywood. We use to fly 'combat' in club with them but I can't find any information or plans. Does anyone else remember this plane? Thanks.