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The Pratt & Whitney JT9D turbofan was developed to power the first generation of wide-body commercial jets. It first ran in 1966, was flight tested in 1968, and received FAA certification in 1969.

JT9D engines powered the Boeing 747 on its first flight on February 9, 1969, and entered airline service in 1970. The JT9D also powered some versions of the McDonnell Douglas DC-10, and Airbus Industrie A300 and A310.

An advanced design, the JT9D was the first of the very large, high bypass ratio turbofans in commercial service. The JT9D displayed here is a pre-production engine built for ground testing rather than for flight, although it is outwardly identical to production examples.

 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
Date 1969 Country of Origin United States of America Type PROPULSION-Turbines (Jet) Manufacturer Pratt & Whitney
 Physical Description Type: Turbofan, 2-shaft Thrust: 235,700 N (53,000 lb) Compressor: Single-stage fan, 3-stage low pressure, 11-stage high pressure Combustor: Annular Turbine: 2-stage high pressure , 4-stage low pressure Weight: 4,153 kg (9,155 lb) Dimensions 3-D: 696 × 279.4cm (22 ft. 10 in. × 9 ft. 2 in.)
Estimated weight (without cowling or pylon weights): 9,155 lbs.
 Materials Metal, plastic
 Inventory Number A19820085000 Credit Line Gift of Pratt & Whitney Aircraft, Division of United Technologies Corporation Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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