American Propeller and Mfg Co. Propeller, fixed-pitch, two-blade, wood


Display Status:

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 was designed for the World War I American Liberty engine, and could have been used on the British designed, American built De Havilland DH-4 general purpose military airplane.

Collection Item Long Description:

Data Source

National Air and Space Museum

Restrictions & Rights

Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum

Credit Line

Found in the collection.


Laminated wood, Paint, Solder, Steel


3-D: 304.8 × 30.5 × 18.4cm, 27.7kg (10 ft. × 1 ft. × 7 1/4 in., 61lb.)

Country of Origin

United States of America

Physical Description

  • Type: Two-Blade, Fixed-Pitch, Wood
  • Diameter: 305 cm (120 in.)
  • Chord: 25.7 cm (10.125 in.)
  • Engine Application: Liberty L-12, V-12, 300 kw (400 hp)


PROPULSION-Propellers & Impellers

Inventory Number