General Electric CJ805-23
GE's CJ805-23 is an aft-fan turbofan derivative of CJ805-3 for the Convair 990. The Smithsonian record describes a 17-stage axial compressor, single-stage aft fan, cannular combustor, and three-stage main/one-stage free turbine, with reported thrust at 7,684 rpm. It remains separate from the turbojet model because its propulsion architecture changed.
Identity
- Aliases
- GE CJ805-23General Electric CJ805-23J79-X220
- Domains
- aviation
- Identity Level
- model
- Kind
- turbofan
- Name
- General Electric CJ805-23
- Status
- retired
Details
- Air Breathing Specs
- Max Thrust Kn
- 71.612
- Description
- GE's CJ805-23 is an aft-fan turbofan derivative of CJ805-3 for the Convair 990. The Smithsonian record describes a 17-stage axial compressor, single-stage aft fan, cannular combustor, and three-stage main/one-stage free turbine, with reported thrust at 7,684 rpm. It remains separate from the turbojet model because its propulsion architecture changed.
- Developers
- Lineage
- Note
- The CJ805-23 retained the CJ805-3/J79 core but added a free-turbine-driven aft fan, making it a turbofan rather than a turbojet.
- Related Propulsion System
- Relationship
- direct-derivative-of
- Sources
- Accessed Date
- 2026-07-29
- Note
- Supports CJ805 as the non-afterburning commercial J79 derivative and CJ805-23 as the distinct aft-fan version.
- Publisher
- GE Aerospace
- Title
- GE, Howard Hughes, and a brave new world
- Accessed Date
- 2026-07-29
- Note
- Supports CJ805-23 as an aft-fan turbofan developed from CJ805-3 rather than another turbojet variant.
- Publisher
- Smithsonian National Air and Space Museum
- Title
- General Electric CJ805-23 Turbofan Engine, Cutaway
- Manufacturers
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 21:41:44 UTC
- Updated Time
- August 22, 2026 at 15:30:32 UTC
Other
- Sources
- Accessed Date
- 2026-07-29
- Note
- Supports the CJ805-3 and CJ805-23 product boundary, aft-fan development, and 1962 production end.
- Publisher
- GE Aerospace
- Title
- 50 years ago: GE roars back into the airline industry
- Accessed Date
- 2026-08-22
- Note
- Smithsonian technical record reports 71,612 N (16,100 lb) thrust at 7,684 rpm and describes a 17-stage axial compressor, single-stage aft fan, cannular combustor, and three-stage main/one-stage free turbine; the reported thrust is normalized to 71.612 kN in airBreathingSpecs.maxThrustKn, with no separate static rating asserted.
- Publisher
- Smithsonian National Air and Space Museum
- Title
- General Electric CJ805-23 Turbofan Engine, Cutaway