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Williams WR19 Turbofan Engine


Display Status:

This object is on display in the Jet Aviation exhibition at the National Air and Space Museum in Washington, DC.

Collection Item Summary:

The Williams WR19 is the world’s smallest turbofan power plant. It has been used in the Bell Flying Belt, the Williams Aerial Systems Platform (WASP), and the Kaman Stowable Aircrew Vehicle Escape Rotoseat (SAVER). Developments of this turbofan engine power the Foxjet business aircraft and all U.S. cruise missiles under development in 1980.

Small turbine engines such as WR19 are finding industrial, marine, automotive, and pipeline applications. Earlier Williams turbojets powered unmanned target drones and were used as auxiliary power units for military transport aircraft. The initial high cost of such powers is often offset by their efficiency, low operating costs, and low maintenance requirements.

Collection Item Long Description:

Data Source

National Air and Space Museum


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


Sam Williams

Credit Line

Gift of Williams Research Corporation, Walled Lake, Michigan




Length 61 cm (24.0 in.), Diameter 30.5 cm (12.0 in.)

Country of Origin

United States of America



Physical Description

  • Type: Turbofan
  • Thrust: 1,910 N (430 lb)
  • Fan: 2-stage axial
  • Compressor: 2-stage axial low pressure, single-stage centrifugal high pressure
  • Combustor: Annular
  • Turbine: Single-stage high pressure, 2-stage low pressure
  • Weight: 30 kg (67 lb)


PROPULSION-Turbines (Jet)

Inventory Number