The Series C "Wasp” Engines
A NEW “WASP” engine embodying several modifications in the design of previous models, has been placed in production by the Pratt & Whitney Aircraft Corporation of Hartford, Conn. This engine, which is designated “Series C,” has a commercial rating of 420 hp. at 2,000 r.p.m. and a military rating of 450 hp. at 2,100 r.p.m.