S.C.W. stood for Sayers, Courtney and Wright, the three designers. Their product was influenced by the Hannover Vampyr which had won the recent German competition at the Wasserkuppe but there were significant differences in both construction and aerodynamics. A contemporary report claimed that the S.C.W. had been designed in 19 hr and built in 19 days. It was a wooden high wing cantilever monoplane. Its wing was of two spar construction, the spars built up from spruce with plywood webs. The wings were plywood covered ahead of the forward spar and fabric covered aft, with an almost rectangular plan of constant chord out nearly to the slightly bevelled wing tips. At 7.7, the aspect ratio was less than on the Vampyr (10.8) and the airfoil was also different. Whereas the Vampire used the airfoil (as did the Handasyde glider that came second at the Itford competition), the S.C.W. used the flat-bottomed T.62 section intended for propellers. Like the Handasyde, the S.C.W. had triangular ailerons reaching to the wing tips where their chord was greatest.