Encyclopedia Astronautica
Reusable Orbital Carrier



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ROC
Reusable Orbital Carrier
Credit: NASA
American manned spaceplane. Study 1964. The Reusable Orbital Carrier (ROC) was a 1964 Lockheed study of a sled-launched HTHL TSTO. The second stage orbiter rocketplane would use Lox/LH2 propulsion to orbit and make an unpowered glide return and landing.

The vehicle could deliver ten passengers+3000kg to a space station.

The Reusable Orbital Carrier (ROC) was a 1964 Lockheed study of a sled-launched HTHL TSTO. The booster's rocket engines would burn liquid oxygen and jet fuel while small turbojets would be used for landing approach. The 2nd stage orbiter rocketplane would make an unpowered glide return and landing. LOX, LH2 rocket propulsion would be used on the second stage. The gross liftoff weight would be about 453t and the vehicle could deliver ten passengers+3000kg to a space station. Alternatively, an unmanned 11,340kg payload could be carried.

The expected development cost was $3 billion at 1964 rates ($16 billion at 1999 rates) and the cost per flight was $100/lb, or $1,184/kg at 1999 rates. NASA saw the small 10-passenger ROC as a vehicle to prove out in small scale a larger 100-passenger "Reusable Aero-Space Transport" for the 1980s. RAST would use high-pressure oxygen+hydrogen engines and turbojets for landing on both stages. The booster rocketplane would be a multipurpose vehicle, with the 2nd stage being tailored to fit specific applications such as global passenger transportation, NASA space station resupply or military missions. The designers felt ballistic "recoverable" vertically launched vehicles make more sense for launching heavy unmanned one-way payloads, since the recovery system (chutes or retrorockets) would cost less. On the other hand, winged vehicles and lifting recovery would be safer for returning manned crews. The marginal cost per flight and the turnaround time would also be less, if the flight rates were high enough.

Characteristics

Crew Size: 10.

Payload: 3,000 kg (6,600 lb).

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Associated Countries
See also
Associated Launch Vehicles
  • Reusable Orbital Carrier American sled-launched winged orbital launch vehicle. The Reusable Orbital Carrier (ROC) was a 1964 Lockheed study of a sled-launched HTHL TSTO. The booster's rocket engines would burn liquid oxygen and jet fuel while small turbojets would be used for landing approach. The 2nd stage orbiter rocketplane would make an unpowered glide return and landing. LOX, LH2 rocket propulsion would be used on the second stage. The gross liftoff weight would be about 453t and the vehicle could deliver ten passengers+3000kg to a space station. Alternatively, an unmanned 11,340kg payload could be carried. More...

Associated Manufacturers and Agencies
  • Lockheed American manufacturer of rockets, spacecraft, and rocket engines. Lockheed Martin, Sunnyvale, CA, USA. More...

Bibliography
  • Osmun, "Reusable Launch Vehicles", Space/Aeronautics, 1964/September/p.43.
  • Heppenheimer, T A, The Space Shuttle Decision, NASA History Office, NASA SP-4221, 1999.
  • "Space Transporter Study", Spaceflight, 1965/p.124.

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