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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