Trax, just a heads up. I can't speak for the Curtiss Hawk but I too purchased the Halls plans thinking I could make a 1/4 scale plane from them. What I got was a blown up plan of a simple rubber band powered design from the 1940's. It was totally worthless to me. The outlines weren't even accurate. I suggest before you spend any more money get the plans in hand and evaluate them for your needs. The best plans for the Bulldog are by Don Neill.