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Pratt & Whitney J58

A single-spool afterburning turbojet with distinctive high-speed compressor-bleed bypass operation.

Pratt & Whitney J58 — NASA Photo / Tony Landis · NASA states its content generally is not subject to U.S. copyright when not identified as third-party material, subject to NASA media-usage guidelines; use factually, credit NASA Photo / Tony Landis, do not imply NASA endorsement, and do not treat NASA identifiers or logos as freely reusable. The NASA page identifies this image as NASA Photo / Tony Landis rather than a third-party licensed work. · Source

Identity

Aliases: JT11D-20
Domains: aviation
Identity Level: model
Kind: turbojet
Name: Pratt & Whitney J58
Status: retired

Details

Air Breathing Specs

Afterburning Thrust Kn: 133.44
Spool Count: 1

Description

A single-spool afterburning turbojet with distinctive high-speed compressor-bleed bypass operation.

Developers

Manufacturers

Links

Official Url: https://www.lockheedmartin.com/en-us/who-we-are/business-areas/aeronautics/skunk-works/sr-71-blackbird.html

Assets & Meta

Creation Time: July 29, 2026 at 07:55:39 UTC
Updated Time: August 22, 2026 at 14:47:44 UTC
Image: Download

Other

Sources

Accessed Date
2026-07-29
Publisher
NASA Technical Reports Server
Title
The J58 turbojet engine
Url
https://ntrs.nasa.gov/api/citations/20090007797/downloads/20090007797.pdf
Accessed Date
2026-07-29
Note
Supports the legacy vehicle installation and the narrow canonical identity used for migration.
Publisher
Official vehicle or program source
Title
Lockheed SR-71 Blackbird official vehicle reference
Url
https://www.lockheedmartin.com/en-us/who-we-are/business-areas/aeronautics/skunk-works/sr-71-blackbird.html
Accessed Date
2026-08-22
Note
Smithsonian's exact J58/JT11D-20 collection record lists 133,440 N afterburning thrust, an 8-stage axial compressor, a 2-stage turbine, and afterburner configuration; thrust is normalized to 133.44 kN.
Publisher
Smithsonian National Air and Space Museum
Title
Pratt & Whitney J58 (JT11D-20) Turbojet Engine
Url
https://airandspace.si.edu/collection-objects/pratt-whitney-j58-jt11d-20-turbojet-engine/nasm_A19920006000