Hamilton Standard Propeller, 3-Blade, Metal


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:

The Hamilton Standard Hydromatic propeller introduced in the 1930s was a significant advance over the counterweight, controllable pitch propeller. 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.

With this advance, Hamilton Standard became the primary propeller manufacturer for the Allies during World War II. Virtually the entire front-line inventory, from multiengine bombers to fighter and transport aircraft, as well as a significant majority of RAF aircraft, employed Hydromatic propellers. Hamilton Standard and its three licensees--refrigerator manufacturers Frigidaire and Nash-Kelvinator, and office equipment maker Remington-Rand--produced 530,135 Hydromatic propeller assemblies during the war. This artifact was manufactured by Nash-Kelvinator.

Collection Item Long Description:

Data Source

National Air and Space Museum

Credit Line

Transferred from the U.S. Air Force


  • Aluminum
  • Paint
  • Steel
  • Synthetic Rubber
  • Adhesive
  • Plastic


Storage: 176.5 x 54.6 x 48.3cm (69 1/2 x 21 1/2 x 19 in.)

Physical Description

  • Type: Three-Blade, Constant-Speed, Metal
  • Diameter: Unknown
  • Chord: Unknown
  • Engine Application: Unknown


PROPULSION-Propellers & Impellers

Inventory Number


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