McCrum revised the plans for the Bird Wing again in the 1950s to install a 450 hp (336 kW) Pratt & Whitney R-985 Wasp Junior radial engine and a 3-inch fuselage widening to convert the design into an agricultural aircraft which never went into production.
[2] St Joseph News Press/Gazette The biplane features welded steel tube fuselage with aircraft fabric covering and spruce wood spar wings.
[2] Among the many pilots who flew the Bird Wing were Hap Arnold and Charles Lindbergh.
The Bird Wing Imperial was tested to meet a 1931 requirement for a United States PT trainer.
Data from Sport Aviation,[2] Jane's All the World's Aircraft 1928[3]General characteristics Performance 4.