Saturn INT-21
Infobox rocket
caption = A Saturn INT-21 launches theSkylab space station, onMay 14 ,1973
name = Saturn INT-21
country-origin =United States
function =Space Station launch vehicle
manufacturer =Boeing (S-IC )
North American (S-II )
height = 80 m
alt-height = 262 ft
diameter = 10 m
alt-diameter = 33 ft
mass = 2,916,000 kg
alt-mass = 6,429,000 lb
stages = 2
LEO-payload =75,000 kg
alt-LEO =
status = Retired
sites = LC-39A,Kennedy Space Center
launches = 1
success = 1
first=May 14 1973
last=May 14 1973
payloads =Skylab
stage1name =S-IC
stage1engines = 5Rocketdyne F-1
stage1thrust = 34.02 MN
alt-stage1thrust = 7,648,000 lbf
stage1SI =
stage1time = 150 seconds
stage1fuel =RP-1 /LOX
stage2name =S-II
stage2engines = 5Rocketdyne J-2
stage2thrust = 5 MN
alt-stage2thrust = 1,000,000 lbf
stage2time = 360 seconds
stage2fuel =LH2 /LOX The Saturn INT-21 was an American orbitallaunch vehicle of the1970s . It was derived from theSaturn V rocket , used for the Apollo program, and is commonly mistaken for the Saturn V. It was only launched once, fromKennedy Space Center atCape Canaveral , carrying theSkylab space station into orbit, at 17:50GMT , onMay 14 ,1973 . It was intended to be used for other flights in theApollo Applications Program , and would have also been used to launch other American space stations, includingSkylab B , theS-IVB Dry Workshop , and theS-II Wet Workshop .The INT-21 and Saturn V have common first and second stages, but they differ in that the INT-21 lacked a third stage. It was also intended to have the instrumentation fitted atop the second stage, but by the time the rocket was actually built, it had been moved to a position atop the payload.
ee also
*
Comparison of heavy lift launch systems
*Project Apollo
*Saturn I
*Saturn IB
*Saturn V
*Skylab
*Apollo Applications Program
*S-IC
*S-II
*SA-1 External links
* [http://www.astronautix.com/lvs/satint21.htm Saturn INT-21 in Encyclopedia Astronautica]
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