Saturn INT-21

Saturn INT-21

Infobox rocket



caption = A Saturn INT-21 launches the Skylab space station, on May 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 = 5 Rocketdyne F-1
stage1thrust = 34.02 MN
alt-stage1thrust = 7,648,000 lbf
stage1SI =
stage1time = 150 seconds
stage1fuel = RP-1/LOX
stage2name = S-II
stage2engines = 5 Rocketdyne J-2
stage2thrust = 5 MN
alt-stage2thrust = 1,000,000 lbf
stage2time = 360 seconds
stage2fuel = LH2/LOX
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 commonly mistaken for the Saturn V. It was only launched once, from Kennedy Space Center at Cape Canaveral, carrying the Skylab space station into orbit, at 17:50 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 S-IVB Dry Workshop, and the S-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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