Manned Orbiting Laboratory
|A 1967 conceptual drawing of the Gemini B reentry capsule separating from the MOL at the end of a mission|
|Mass||31,910 pounds (14,470 kg)|
|Length||71.9 feet (21.9 m)|
|Diameter||10.0 feet (3.05 m)|
|Pressurised volume||400 cubic feet (11.3 m3)|
|Orbital inclination||polar or sun synchronous orbit|
|Days in orbit||40 days|
|Configuration of the Manned Orbital Laboratory|
The Manned Orbiting Laboratory (MOL), originally referred to as the Manned Orbital Laboratory, was part of the United States Air Force's manned spaceflight program, a successor to the cancelled Boeing X-20 Dyna-Soar military reconnaissance space plane project. The project was developed from several early Air Force and NASA concepts of manned space stations to be used for reconnaissance purposes. MOL evolved into a single-use laboratory, with which crews would be launched on 40-day missions and return to Earth using a Gemini B spacecraft, derived from NASA's Gemini program.
The MOL program was announced to the public on December 10, 1963, as a manned platform to prove the utility of man in space for military missions. Astronauts selected for the program were later told of the reconnaissance mission for the program. The contractor for the MOL was the Douglas Aircraft Company. The Gemini B was externally similar to NASA's Gemini spacecraft, although it underwent several modifications, including the addition of a circular hatch through the heat shield, which allowed passage between the spacecraft and the laboratory.
MOL was cancelled in 1969, during the height of the Apollo program, when it was shown that unmanned reconnaissance satellites could achieve the same objectives much more cost-effectively. U.S. space station development was instead pursued with the civilian NASA Skylab (Apollo Applications Program) which flew in the mid-1970s.
There was one test flight of an MOL mockup that was built from a Titan II propellant tank. The Gemini 2 spacecraft was re-flown on a 33-minute sub-orbital test flight. After the Gemini was separated for its sub-orbital reentry, the MOL mockup continued on into orbit and released three satellites. A hatch was installed in the Gemini 2 heat shield to provide access to the MOL and was tested in the sub-orbital reentry. The test flight was launched by the USAF on November 3, 1966 at 13:50:42 UTC on launch vehicle Titan IIIC-9 from LC-40 at Cape Canaveral Air Force Station. The Gemini 2-MOL space capsule was recovered near Ascension Island in the South Atlantic by the USS La Salle.
The MOL was planned to use a helium-oxygen atmosphere. It used a Gemini B spacecraft as a reentry vehicle. The crew were to be launched with the Gemini B and MOL, and returned to Earth in the Gemini B. They would conduct up to 40 days of military reconnaissance using large optics, cameras, and side-looking radar.
The USAF Astronaut Maneuvering Unit (AMU) was developed for the MOL project. NASA chief astronaut Deke Slayton later speculated in his autobiography that the AMU may have been developed for MOL because the Air Force "thought they might have the chance to inspect somebody else's satellites."
In response to the announcement of the MOL, the USSR commissioned the development of its own military space station, Almaz. Three Almaz space stations flew as Salyut space stations, and the program also developed a military add-on used on Salyut 6 and Salyut 7.
- MOL Group 1 - November 1965
- Michael J. Adams USAF (1930-1967) — killed on X-15 flight, November 15, 1967.
- Albert H. Crews Jr. USAF
- John L. Finley USN (1935-2006)
- Richard E. Lawyer USAF (1932-2005)
- Lachlan Macleay USAF
- Francis G. Neubeck USAF
- James M. Taylor USAF (1930-1970) — killed on T-38 flight, September 4, 1970.
- Richard H. Truly USN — Pilot, Space Shuttle Enterprise ALT #2, STS-2; Commander: STS-8; Commander, Naval Space Command as a Vice Admiral; Administrator: NASA, 1989-92.
- MOL Group 2 - June 1966
- Karol J. Bobko USAF — Pilot, STS-6, Commander, STS-51-D. STS-51-J
- Robert L. Crippen USN — Pilot, STS-1, Commander, STS-7, STS-41C, STS-41G; Director, Kennedy Space Center, 1992–95
- C. Gordon Fullerton USAF (1936-2013) — Pilot, Space Shuttle Enterprise ALT #1, STS-3, Commander, STS-51-F
- Henry W. Hartsfield, Jr. USAF — Pilot, STS-4, Commander, STS-41-D, STS-61-A; Director, Human Exploration and Development of Space Independent Assurance
- Robert F. Overmyer USMC (1936-1996) — Pilot, STS-5, Commander: STS-51-B; killed in Cirrus crash, March 22, 1996
- MOL Group 3 - June 1967
- James A. Abrahamson USAF — Director: Strategic Defense Initiative as a Lieutenant General
- Robert T. Herres USAF (1932-2008) — Vice Chairman: Joint Chiefs of Staff as a General
- Robert H. Lawrence, Jr. USAF (1935-1967) — Killed in training accident, December 8, 1967
- Donald H. Peterson USAF — Mission specialist: STS-6
MOL flight schedule
- 1966 November 3 - MOL mockup - refurbished Gemini 2 capsule launched unmanned
- 1970 December 1 - MOL 1 - First unmanned Gemini-B/Titan 3M qualification flight (Gemini-B flown alone, without an active MOL).
- 1971 June 1 - MOL 2 - Second unmanned Gemini-B/Titan 3M qualification flight (Gemini-B flown alone, without an active MOL).
- 1972 February 1 - MOL 3 - A crew of two (James M. Taylor, Albert H. Crews) would have spent thirty days in orbit.
- 1972 November 1 - MOL 4 - Second manned mission.
- 1973 August 1 - MOL 5 - Third manned mission.
- 1974 May 1 - MOL 6 - Fourth manned MOL mission. All Navy crew composed of Richard H. Truly and Robert Crippen.
- 1975 February 1 - MOL 7 - Fifth manned MOL.
Starting in 1965 a large optical system was added to the spacecraft for military reconnaissance. This camera system was codenamed Dorian and given the designation KH-10. The project was canceled on June 10, 1969 before any operational flights occurred.
The KH-10 intended for the MOL program was succeeded by the unmanned KH-11 Kennan, which launched in 1976 as the Soviet Union was winding down its manned space reconnaissance program. The KH-11 achieved the goal of 3-inch (76 mm) imaging resolution and introduced video transmission of images back to Earth.
The program was canceled on 10 June 1969, with the first projected flight three years away. Between 1965 and 1969, MOL's projected cost rose from $1.5 billion to $3 billion while the Vietnam War took larger portions of the defense budget. While Defense Secretary Melvin R. Laird and the Joint Chiefs of Staff strongly supported the station, Central Intelligence Agency head Richard Helms did not support the project because he feared that the death of a MOL astronaut might ground launches and thus damage the nation's satellite reconnaissance program. President Richard Nixon and National Security Advisor Henry Kissinger agreed to the Bureau of the Budget's proposal to cancel MOL, as it was determined the capabilities of unmanned spy satellites met or exceeded the capabilities of manned MOL missions.
NASA offered those under 35 years of age the opportunity to transfer to its astronaut program. Seven of the 14 MOL astronauts were younger than 35 and took the offer, becoming NASA Astronaut Group 7: future NASA Administrator Richard H. Truly, Karol J. Bobko, Robert Crippen, C. Gordon Fullerton, Henry W. Hartsfield, Robert F. Overmyer, and Donald H. Peterson. All flew on the Space Shuttle.
The Gemini 2 capsule used in the only flight of the MOL program is on display at the Air Force Space & Missile Museum at Cape Canaveral Air Force Station. A test article at the National Museum of the United States Air Force, at Wright-Patterson AFB, Ohio is the Gemini B spacecraft (sometimes confused with Blue Gemini). It is recognized by its distinctive "US Air Force" written on the side, and the circular hatch cut through the heat shield.
- Crew: 2
- Maximum duration: 40 days
- Orbit: Sun synchronous or polar
- Length: 21.92 m
- Diameter: 3.05 m
- Cabin Volume: 11.3 m³
- Mass: 14,476 kilograms (31,914 lb)
- Payload: 2,700 kilograms (6,000 lb)
- Power: fuel cells or solar cells
- RCS system: N2O4/MMH
- Almaz - Soviet equivalent to MOL; launched under "Salyut" name
- Big Gemini
- Manned Orbital Development System
- OPS 0855
- Polyus - Soviet orbiting battle station
- Titan III
- TKS - Soviet equivalent to MOL and Big Gemini spacecraft
- "NOVA: Astrospies". PBS. Retrieved October 13, 2011.
- Slayton, Donald K. "Deke"; Cassutt, Michael (1994). Deke! U.S. Manned Space: From Mercury to the Shuttle (1st ed.). New York: Forge (St. Martin's Press). p. 249. ISBN 0-312-85503-6. LCCN 94-2463. OCLC 29845663.
- Slayton and Cassutt, p. 174.
- Almaz military stations on Russian Space Web, Accessed: February 12, 2011.
- Almaz military stations on Encyclopedia Astronautica, Accessed: February 12, 2011
- Almaz Military Space Station Program, Accessed: February 12, 2011.
- "Suits for Space Spies", Accessed: February 12, 2011.
- Heppenheimer, T. A. (1998). The Space Shuttle Decision. NASA. pp. 204–205.
- Hall Displays Air Force Space Museum, Accessed: February 12, 2011,
- Gemini-B Spacecraft, Accessed: February 12, 2011.
|Wikimedia Commons has media related to Manned Orbiting Laboratory.|
- NASA Archives on MOL Retrieved October 13, 2011.
- Wade, Mark (April 18, 2004). MOL. Encyclopedia Astronautica. Retrieved April 23, 2004.
- presentation on the Gemini 2 and the Manned Orbiting Laboratory spacecraft on display at the Air Force Space and Missile Museum
- Gemini B - MOL Mockup - Titan III Test Flight 11-03-1966 Mission Report
- PBS Nova - Astrospies television media