Castor (rocket stage)
The Castor family of solid-fuel rocket stages and boosters built by Thiokol and used on a variety of launch vehicles. They were initially developed as the second-stage motor of the Scout rocket. The design was based on the MGM-29 Sergeant, a surface-to-surface missile developed for the United States Army at the Jet Propulsion Laboratory.Versions
Castor 1
Castor 2
Castor 4
Castor 30
Castor 120
Instead of using a D6AC steel case and PBAN binder like the Space Shuttle SRB, these will use the technology derived from the GEM motors which have carbon composite cases and HTPB binder. The carbon composite design eliminates the factory joint common on all Space Shuttle SRBs.Castor 300
Castor 600
Castor 1200