Svenska Flygmotor RM8B
The uprated RM8B afterburning turbofan variant developed for the JA 37 air-defense Viggen, with a three-stage fan and higher thrust.
Identity
- Aliases
- RM8BRM 8B
- Domains
- aviation
- Identity Level
- variant
- Kind
- turbofan
- Name
- Svenska Flygmotor RM8B
- Status
- retired
Details
- Air Breathing Specs
- Afterburning Thrust Kn
- 125
- Sea Level Static Thrust Kn
- 72.1
- Description
- The uprated RM8B afterburning turbofan variant developed for the JA 37 air-defense Viggen, with a three-stage fan and higher thrust.
- Developers
- Family
- Lineage
- Note
- RM8B is the JA 37-specific uprating of RM8A with a new low-pressure compressor, an additional fan stage, and a modified afterburner.
- Related Propulsion System
- Relationship
- direct-derivative-of
- Sources
- Accessed Date
- 2026-07-30
- Note
- Maps RM8A to AJ, SK, SH, and SF 37 and RM8B to JA 37; documents the JT8D-22 license agreement, SFA/Pratt & Whitney cooperation, three-stage RM8B fan, and 115.6/125 kN afterburning ratings.
- Publisher
- Svensk Militär Flygplanshistorik
- Title
- Fpl 37 – Teknik och data
- Accessed Date
- 2026-07-30
- Note
- Technical-history table maps Pratt & Whitney JT8D to Swedish RM8A and RM8B and distinguishes the licensed Swedish adaptations and their afterburning/dry thrust values.
- Publisher
- Flyg- och rymdtekniska föreningen
- Title
- Aerospace Propulsion: From Insects to Spaceflight
- Manufacturers
Links
Assets & Meta
- Creation Time
- July 30, 2026 at 20:32:54 UTC
- Updated Time
- July 30, 2026 at 20:33:51 UTC
Other
- Sources
- Accessed Date
- 2026-07-30
- Note
- Maps RM8A to AJ, SK, SH, and SF 37 and RM8B to JA 37; documents the JT8D-22 license agreement, SFA/Pratt & Whitney cooperation, three-stage RM8B fan, and 115.6/125 kN afterburning ratings.
- Publisher
- Svensk Militär Flygplanshistorik
- Title
- Fpl 37 – Teknik och data
- Accessed Date
- 2026-07-30
- Note
- Technical-history table maps Pratt & Whitney JT8D to Swedish RM8A and RM8B and distinguishes the licensed Swedish adaptations and their afterburning/dry thrust values.
- Publisher
- Flyg- och rymdtekniska föreningen
- Title
- Aerospace Propulsion: From Insects to Spaceflight
- Accessed Date
- 2026-07-30
- Note
- Confirms the five Saab 37 versions, first flight and retirement history, and the SFA RM8B installation with 125 kN afterburning thrust.
- Publisher
- Saab
- Title
- Saab 37 Viggen