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Hamilton Standard Hydromatic Propeller, Constant-Speed, Three-Blade, Metal
Thomas Hamilton, general manager of the aircraft department of Matthews Brothers Manufacturing Company, of Milwaukee, Wisconsin, primarily a producer of furniture, bought the propeller business from Matthews in 1919 and formed the Hamilton Aero Manufacturing Company, later becoming a secondary source to the United States government for the ground-adjustable propeller pioneered by Standard Steel.
William E. Boeing, one of the founders of the United Aircraft and Transport Corporation, enticed Hamilton to join UATC. With the later acquisition of Standard Steel, the Hamilton Standard Propeller Corp. was formed.
The hydromatic propeller introduced in the 1930s was a significant advance over the counterweight, controllable pitch propeller. The application of oil pressure to both sides of the actuating piston provided increased capacity and the capability of feathering or unfeathering by a single control knob. Reverse pitch permitted shortened landing roll.
Display Status
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Country of Origin
United States of America
Type
PROPULSION-Propellers & Impellers
Manufacturer
Hamilton Standard Propellers
Physical Description
Type: Three-Blade, Constant-Speed, Metal
Diameter: 304.8 cm (120 in.)
Chord: Unknown
Engine Application: Unknown
Dimensions
3-D (Aluminum Pallet Storage): 68.6 × 121.9 × 50.8cm, 186.9kg (2 ft. 3 in. × 4 ft. × 1 ft. 8 in., 412lb.)
3-D (Gear Cap): 27.9 × 27.9 × 30.5cm, 4.5kg (11 × 11 × 1 ft., 10lb.)
3-D (Propeller w/ Main Gear): 172.7 × 40.6 × 27.9cm, 79.4kg (5 ft. 8 in. × 1 ft. 4 in. × 11 in., 175lb.)
3-D (Propellers w/o Main Gear): 147.3 × 27.9 × 17.8cm, 29.9kg (4 ft. 10 in. × 11 in. × 7 in., 66lb.)
Materials
Steel
Paint
Preservative Coating
Rubber
Paper
White Metal
Phenolic Resin
Inventory Number
A19601377000
Credit Line
Transferred from the U.S. Air Force
Data Source
National Air and Space Museum
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