Pratt & Whitney J75/JT4A family
Pratt & Whitney J75 is a retired axial-flow turbojet family developed in the early 1950s as a larger successor to the J57. Afterburning and non-afterburning versions powered the Convair F-106 Delta Dart, Republic F-105 Thunderchief, and Lockheed U-2; the commercial JT4A derivative powered Boeing 707-200/-300 and Douglas DC-8-20/-30 aircraft. Documented J75 ratings span roughly 24,500–26,500 lb with afterburner, with exact model ratings and installations kept as separate identities.
Identity
- Aliases
- J75Pratt & Whitney J75JT4A
- Domains
- aviation
- Identity Level
- family
- Kind
- turbojet
- Name
- Pratt & Whitney J75/JT4A family
- Status
- retired
Details
- Description
- Pratt & Whitney J75 is a retired axial-flow turbojet family developed in the early 1950s as a larger successor to the J57. Afterburning and non-afterburning versions powered the Convair F-106 Delta Dart, Republic F-105 Thunderchief, and Lockheed U-2; the commercial JT4A derivative powered Boeing 707-200/-300 and Douglas DC-8-20/-30 aircraft. Documented J75 ratings span roughly 24,500–26,500 lb with afterburner, with exact model ratings and installations kept as separate identities.
- Developers
- Manufacturers
Links
Assets & Meta
- Creation Time
- August 14, 2026 at 11:11:52 UTC
- Updated Time
- August 14, 2026 at 11:11:52 UTC
Other
- Sources
- Accessed Date
- 2026-08-14
- Note
- Smithsonian records J75 development, 1957 production, 24,500–26,500 lb afterburning ratings, and F-106/F-105/U-2 installations; JT4 was the commercial derivative.
- Publisher
- National Air and Space Museum
- Title
- Pratt & Whitney J75-P-13B Turbojet Engine
- Accessed Date
- 2026-08-14
- Note
- Smithsonian records the J75/JT4A commercial derivative on Boeing 707 and Douglas DC-8 aircraft and distinct afterburning/non-afterburning configurations.
- Publisher
- National Air and Space Museum
- Title
- Pratt & Whitney J75-P-19W Turbojet Engine
- Accessed Date
- 2026-08-14
- Note
- P&W confirms JT4A as the commercial version of the J75 and its 707-200/-300 and DC-8 applications.
- Publisher
- Pratt & Whitney
- Title
- 50 Years Ago, Pratt & Whitney Engines Helped Bring Beatles to U.S.