Castor IIA
Castor IIA is the exact solid second-stage motor used in Scout G-1 and Scout D-1 configurations, retained separately from other Castor variants. NASA's Scout G-1 characteristics identify a 284.3 kN average-thrust motor with a nominal burn time of 35 seconds. NASA's historical Scout table identifies Thiokol Chemical Corp. as the second-stage propulsion contractor; this record links the motor to AeroVia's canonical Thiokol company record. NASA records the final Scout launch on 5 August 1994, so this Scout-specific motor designation is marked retired without generalizing that status to every Castor derivative.
Identity
- Aliases
- Castor 2AScout-G second-stage Castor IIA
- Domains
- spaceflight
- Identity Level
- variant
- Kind
- solid-rocket-motor
- Name
- Castor IIA
- Status
- retired
Details
- Description
- Castor IIA is the exact solid second-stage motor used in Scout G-1 and Scout D-1 configurations, retained separately from other Castor variants. NASA's Scout G-1 characteristics identify a 284.3 kN average-thrust motor with a nominal burn time of 35 seconds. NASA's historical Scout table identifies Thiokol Chemical Corp. as the second-stage propulsion contractor; this record links the motor to AeroVia's canonical Thiokol company record. NASA records the final Scout launch on 5 August 1994, so this Scout-specific motor designation is marked retired without generalizing that status to every Castor derivative.
- Developers
- Manufacturers
- Propellants
- solid composite propellant
- Rocket Specs
- Burn Time S
- 35
- Sea Level Thrust Kn
- 284.3
Links
Assets & Meta
- Creation Time
- August 1, 2026 at 15:52:12 UTC
- Updated Time
- August 21, 2026 at 01:02:28 UTC
Other
- Sources
- Accessed Date
- 2026-08-01
- Note
- NASA's U.S. launch-vehicle table lists Scout stage 2 as Castor IIA and identifies the all-solid four-stage Scout stack.
- Publisher
- NASA
- Title
- Aeronautics and Space Report of the President, 1981
- Accessed Date
- 2026-08-01
- Note
- The NASA Scout-G-1 report describes the four-stage all-solid vehicle and its tandem propulsion-motor arrangement.
- Publisher
- NASA Technical Reports Server
- Title
- NASA News: Scout-G-1 launch vehicle
- Accessed Date
- 2026-08-20
- Note
- NASA's Scout G1 characteristics table identifies Castor IIA as the solid second-stage motor and reports 284.3 kN average thrust and a 35-second nominal burn time.
- Publisher
- NASA
- Title
- NASA Historical Data Book, Volume VII — Scout G1 characteristics
- Accessed Date
- 2026-08-20
- Note
- NASA's 1994 release identifies the 5 August 1994 flight as the final Scout launch, supporting retired lifecycle treatment for this Scout-specific motor designation.
- Publisher
- NASA
- Title
- Scout launch vehicle to retire after 34 years of service