GEM motor family
GEM (Graphite Epoxy Motor) is a family of composite-case solid strap-on boosters. GEM 40 powered Delta II; the larger GEM 46 served Delta III and Delta II Heavy; GEM 60 served Delta IV Medium+. GEM 63 and 63XL continue the family on Atlas V and Vulcan. Nozzle and ignition configurations vary by model.
Identity
- Domains
- spaceflight
- Identity Level
- family
- Kind
- solid-rocket-motor
- Name
- GEM motor family
- Status
- active
Details
- Description
- GEM (Graphite Epoxy Motor) is a family of composite-case solid strap-on boosters. GEM 40 powered Delta II; the larger GEM 46 served Delta III and Delta II Heavy; GEM 60 served Delta IV Medium+. GEM 63 and 63XL continue the family on Atlas V and Vulcan. Nozzle and ignition configurations vary by model.
- Developers
- Manufacturers
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 08:34:13 UTC
- Updated Time
- October 29, 2026 at 15:55:44 UTC
- Image
- Download
Other
- Sources
- Accessed Date
- 2026-07-29
- Publisher
- Northrop Grumman
- Title
- GEM Motor Series Propulsion Products Catalog
- Accessed Date
- 2026-10-29
- Note
- GEM family overview and exact configuration pages distinguish ignition and nozzle alternatives; historical catalogue lifecycle checked against the 2025 sheet.
- Publisher
- Northrop Grumman
- Title
- GEM Motor Series — product catalogue