RE: STORMER design by Doug Spreng,
Doug Spreng won the Nats with a Stormer in 1960 and again in 1961 with the FT Stormer. He used a Veco .45 on both. The principle difference was the Stormer used a big block of balsa carved for the fuselage top (pretty, but a pain to carve and hollow) while the FT was just sheet balsa (like a Falcon). Both were flown on reeds. There were some variations in wing design, in span and also taper, but I believe most of his airplanes ended up using the constant chord for ease of building (good pilot, but radios of the day were unreliable). His articles on the designs were interesting reads, in a Dobie Gillis - Maynard beatnik sort of way.