This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Collection Item Summary:
An early predominant manufacturer in the United States, Spencer Heath's American Propeller and Manufacturing Company opened in Baltimore in 1909. Heath was first to use machines for mass production of aircraft propellers and, under the Paragon trademark, these were widely used in World War I. Like most propellers of that era, construction was a wood laminate because of light weight, strength, fabrication ease, and resistance to fatigue in a vibrating and flexing environment.
Heath demonstrated the first "engine-powered, engine-controlled, variable and reversible pitch propeller" in 1919, but was unsuccessful in convincing the Army of the practicality of the concept. He sold the company to the Bendix Corporation in 1929 and retired from aeronautics two years later.
This propeller is from the Benoist Flying Boat, which became the world's first airliner, flying between St.Petersburg and Tampa, Florida in 1914-15.
Collection Item Long Description:
- Copper Alloy
- Rotor/Propeller: 274.3 x 20.3 x 19.7 x 11.4 x 7.6cm (108 x 8 x 7 3/4 x 4 1/2 x 3 in.)
- 3-D: 273.7 x 21 x 10.8cm (107 3/4 x 8 1/4 x 4 1/4 in.)
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Country of Origin
- Type: Two-Blade, Fixed-Pitch, Wood
- Diameter: 274.3 cm (108 in.)
- Chord: 20.3 cm (8 in.)
- Engine Application: Unknown