The Jupiter-C was a type of sounding rocket used for three sub-orbital spaceflights conducted in 1956 and 1957. It was designed by the Army Ballistic Missile Agency (ABMA), and all three flights were launched from the Cape Canaveral Air Force Station. Description Each vehicle consisted of a modified Redstone ballistic missile with two solid-propellant upper stages. The tanks of the Redstone were lengthened by 8 ft (2.4 m) to provide additional propellant. The instrument compartment was also s… (More on Jupiter-c)