M55A1 Thiokol solid rocket engine. Minuteman 1A T first stage. |
M55/TX-55/Tu-122 Thiokol solid rocket engine. In production. Proposed as strap-on booster for Saturn IB-C, Saturn INT-14, Saturn INT-15, Saturn INT-19 variants. First flight 2000. Solid propellant rocket stage. First stage of Minuteman I. Proposed as zero stage for various Saturn variants in 1960's. Surplus motors used in ABM SDI tests in 1980's and 1990's. Minuteman first stage. |