The Travel Air “Mystery Ship,” officially designated NR614K, was a pioneering low-wing monoplane developed in 1928 by the Travel Air Company of Wichita, Kansas. Designed by engineers Herb Rawdon and Walter Burnham under the leadership of Walter Beech, the aircraft was built in secrecy and debuted dramatically at the 1929 National Air Races in Cleveland.
Key Innovations and Design Features
NACA Cowling and Wheel Pants: The Mystery Ship was among the first aircraft to incorporate the NACA engine cowling and streamlined wheel fairings, significantly reducing drag and influencing future commercial and military aircraft design.
Low-Wing Configuration: Its low-wing layout marked a departure from the biplane norm, setting a trend for future high-speed aircraft.
Construction: The fuselage was made of steel tubing with plywood covering; the wings were all-wood and also plywood-covered. It had a wingspan of 29 ft 2 in and a fuselage length of 20 ft 2 in.
Performance and Power
Engine: Initially powered by a Wright J6-9 radial engine, modified to exceed 400 hp through increased compression and supercharger speed.
Speed: Achieved a top speed of 235 mph and a landing speed of 73 mph.
Race Victory: Piloted by Doug Davis, the Mystery Ship won the 1929 Thompson Cup Race at 194.9 mph, defeating high-powered military aircraft and marking the first time a civilian racer triumphed over military entries.
Variants and Legacy
Multiple Versions: Five Mystery Ships were built, each with unique modifications:
NR613K featured a Chevrolair inline engine before switching to a Wright J6-7.
NR482N, ordered by Shell Oil, was flown by Jimmy Doolittle and Jim Haizlip, achieving notable race placements.
“Texaco 13,” flown by Frank Hawks, was outfitted for long-distance records and set hundreds of speed records across the U.S. and Europe.
A fifth version was built for the Italian government and influenced Italian fighter designs.
Cultural Impact
The Mystery Ship’s success forced the U.S. military to reevaluate aircraft design priorities and accelerated the shift toward low-wing, streamlined configurations.
Its legacy endures in museums and aviation lore, symbolizing the dawn of modern air racing and commercial aircraft design.








