Home - Search - Browse - Alphabetic Index: 0- 1- 2- 3- 4- 5- 6- 7- 8- 9
A- B- C- D- E- F- G- H- I- J- K- L- M- N- O- P- Q- R- S- T- U- V- W- X- Y- Z
Saturn INT-21
Part of Saturn V Family

Saturn V Skylab

Saturn V Skylab
Credit: NASA

American orbital launch vehicle. Saturn variant consisting of S-IC first stage and S-II second stage. This essentially flew once to launch Skylab in 1972, although the IU was located atop the Skylab space station (converted S-IVB stage) rather than atop the S-II as in the INT-21 design.

Status: Study 1967. Payload: 115,900 kg (255,500 lb). Thrust: 33,737.90 kN (7,584,582 lbf). Gross mass: 2,916,080 kg (6,428,850 lb). Height: 80.00 m (262.00 ft). Diameter: 10.06 m (33.00 ft). Apogee: 185 km (114 mi).

Liftoff Mass - kgS-IC - No. F-1 MotorsS-II - No. J-2 MotorsPayload - kg - 4.68 G limit
2,209,0004376,000
2,209,0004484,000
2,209,0004589,000
2,762,00053101,000
2,762,00054112,000
2,762,00055116,000

LEO Payload: 115,900 kg (255,500 lb) to a 185 km orbit at 28.00 degrees. Flyaway Unit Cost 1985$: 681.500 million.

Stage Data - Saturn INT-21

  • Stage 1. 1 x Saturn IC. Gross Mass: 2,286,217 kg (5,040,245 lb). Empty Mass: 135,218 kg (298,104 lb). Thrust (vac): 38,703.160 kN (8,700,816 lbf). Isp: 304 sec. Burn time: 161 sec. Isp(sl): 265 sec. Diameter: 10.06 m (33.00 ft). Span: 19.00 m (62.00 ft). Length: 42.06 m (137.99 ft). Propellants: Lox/Kerosene. No Engines: 5. Engine: F-1. Status: Out of Production.
  • Stage 2. 1 x Saturn II. Gross Mass: 490,778 kg (1,081,980 lb). Empty Mass: 39,048 kg (86,086 lb). Thrust (vac): 5,165.790 kN (1,161,316 lbf). Isp: 421 sec. Burn time: 390 sec. Isp(sl): 200 sec. Diameter: 10.06 m (33.00 ft). Span: 10.06 m (33.00 ft). Length: 24.84 m (81.49 ft). Propellants: Lox/LH2. No Engines: 5. Engine: J-2. Status: Out of Production.



Family: orbital launch vehicle. People: von Braun. Country: USA. Engines: F-1. Spacecraft: Space Station 1970. Stages: Saturn IC, Saturn II.
Photo Gallery

Saturn II stageSaturn II stage
Credit: © Mark Wade


S-1C detailsS-1C details
Credit: © Mark Wade



Home - Search - Browse - Alphabetic Index: 0- 1- 2- 3- 4- 5- 6- 7- 8- 9
A- B- C- D- E- F- G- H- I- J- K- L- M- N- O- P- Q- R- S- T- U- V- W- X- Y- Z
© 1997-2017 Mark Wade - Contact
© / Conditions for Use