The Saturn INT-21 was an American orbital launch vehicle of the 1970s. It was derived from the Saturn V rocket used for the Apollo program, and is casually referred to as a "modified Saturn V." It was only launched once, from Kennedy Space Center at Cape Canaveral, carrying the Skylab space station into orbit, at 17:30 GMT, on May 14, 1973. It was intended to be used for other flights in the Apollo Applications Program, and would have also been u...
more
The Saturn INT-21 was an American orbital launch vehicle of the 1970s. It was derived from the Saturn V rocket used for the Apollo program, and is casually referred to as a "modified Saturn V." It was only launched once, from Kennedy Space Center at Cape Canaveral, carrying the Skylab space station into orbit, at 17:30 GMT, on May 14, 1973. It was intended to be used for other flights in the Apollo Applications Program, and would have also been used to launch other American space stations, including Skylab B.
The INT-21 and Saturn V have common first and second stages, but they differ in that the INT-21 lacked a true third stage. Instead, where the Saturn V had an S-IVB third stage used to propel the Apollo missions to the moon, the INT-21 had the Skylab Orbital Workshop (OWS), a modified, fuel-less S-IVB in which the empty propellant tanks had been fitted out into a scientific laboratory and living area for a later-launched crew. The INT-21 was also originally intended to have the...
less
