Encyclopedia Astronautica
STS-51-I



10062231.jpg
STS-51-I
Aerial view of the launch of Shuttle Discovery STS 51-I mission
Credit: NASA
ists51i.jpg
STS-51-I
Credit: www.spacefacts.de - www.spacefacts.de
10062232.jpg
STS-51-I
Astronaut James van Hoften on RMS tracking Syncom IV-3 after deployment
Credit: NASA
10062234.jpg
STS-51-I
Astronaut James van Hoften working with Syncom IV-3 satellite
Credit: NASA
10062235.jpg
STS-51-I
Astronaut James van Hoften working with Syncom IV-3 satellite
Credit: NASA
10062236.jpg
STS-51-I
The American Satellite Company (ASC) satellite deployed from payload bay
Credit: NASA
10062239.jpg
STS-51-I
Typhoons Pat and Odessa in the Western Pacific Ocean
Credit: NASA
10062245.jpg
STS-51-I
Astronaut James van Hoften working with Syncom IV-3 satellite
Credit: NASA
10062246.jpg
STS-51-I
Astronaut William Fisher anchored to foot restraint on Discovery
Credit: NASA
10062248.jpg
STS-51-I
Australia's AUSSAT satellite deployed from payload bay
Credit: NASA
Crew: Covey, Engle, Fisher William, Lounge, van Hoften. First retrieval, repair, and relaunch of a satellite in orbit (Leasat 3). Manned five crew. Launched Aussat 1, ASC 1, Leasat 4. Suffered primary O-ring erosion in two locations on the left-hand SRM nozzle joint.

Manned five crew. Launched Aussat 1, ASC 1, Leasat 4; repaired Leasat 3. Payloads: Deploy ASC (American Satellite Company)-1 with Payload Assist Modue (PAM)-D. Deploy AUSSAT (Australian communications satellite)-1 with PAM-D. Deploy Syncom IV-4 communications satellite with its unique stage. Retrieve Leasat-3 communications satellite, repair and deploy by extravehicular activity (EVA) astronauts. Physical Vapor Transport Organic Solids (PVTOS) experiment.

Orbits of Earth: 111. Distance traveled: 4,698,602 km. Orbiter Liftoff Mass: 118,981 kg. Orbiter Mass at Landing: 89,208 kg. Payload to Orbit: 19,952 kg. Payload Returned: 6,101 kg. Landed at: Runway 23 dry lake bed at Edwards Air Force Base, . Landing Speed: 353 kph. Touchdown miss distance: 640 m. Landing Rollout: 1,859 m. EVA: James van Hoften and William Fisher. EVA 1 duration 7 hours, 20 minutes, EVA 2 duration 4 hours, 31 minutes.

NASA Official Mission Narrative

Mission Name: 51-I (20)
DISCOVERY (6)
Pad 39-A (32)
20th Shuttle mission
6th Flight OV-103
Shortened mission

Crew:
Joseph H. Engle (2), Commander
Richard O. Covey (1), Pilot
James D. A. van Hoften (2), Mission Specialist 1
John M. Lounge (1), Mission Specialist 2
William F. Fisher (1), Mission Specialist 3

Milestones:
OPF - June 29, 1985
VAB - July 30, 1985
PAD - Aug. 6, 1985

Payload:
ASC-1,AUSSAT-1,LEASAT-4,PVTOS
Mission Objectives:

Launch:
August 27, 1985, 6:58:01 a.m. EDT. Launch Aug. 24 scrubbed at T-5 minutes due to thunderstorms in vicinity. Launch Aug. 25 delayed when orbiter's number five on-board general purpose computer failed. Launch Aug. 27 delayed three minutes, one second due to combination of weather and unauthorized ship entering restricted solid rocket booster recovery area. Launch Weight: 262,309 lbs.
Orbit:
Altitude: 242nm
Inclination: 28.45 degrees
Orbits: 112
Duration: 7 days, 2 hours, 17 minutes, 42 seconds.
Distance: 2,919,576 miles

Hardware:
SRB: BI-020
SRM: L020(HPM)
ET : 21/LWT-14
MLP : 1
SSME-1: SN-2109
SSME-2: SN-2018
SSME-3: SN-2012

Landing:
September 3, 1985, 6:15:43 a.m. PDT, Runway 23, Edwards Air Force Base, Calif. Rollout distance: 6,100 feet. Rollout time: 47 seconds. Mission shortened one day when AUSSAT sunshield hung up on remote manipulator system camera and AUSSAT had to be deployed before scheduled. Orbiter returned to KSC Sept. 8, 1985. Landing Weight: 196,674 lbs.

Mission Highlights:
Three communications satellites deployed: ASC-1 , for American Satellite Company; AUSSAT-1, an Australian Communications Satellite; and SYNCOM IV-4, the Synchronous Communications Satellite. ASC-1 and AUSSAT-1 both attached to Payload Assist Module-D (PAM-D) motors. SYNCOM IV-4 (also known as LEASAT-4) failed to function after reaching correct geosynchronous orbit. Fisher and van Hoften performed 11 hours, 27 minutes of space walk. Part of time spent retrieving, repairing and redeploying LEASAT-3, deployed on Mission 51-D. Middeck

Payload: Physical Vapor Transport Organic Solid Experiment (PVTOS).

AKA: Discovery.
First Launch: 1985.08.27.
Last Launch: 1985.09.03.
Duration: 7.10 days.

More... - Chronology...


Associated People
  • Engle Engle, Joe Henry (1932-) American test pilot astronaut. Flew on X-15 Flight 138, X-15 Flight 143, X-15 Flight 153, STS-2, STS-51-I. More...
  • van Hoften van Hoften, Dr James Dougal Adrianus 'Ox' (1944-) American engineer mission specialist astronaut. Flew on STS-41-C, STS-51-I. Grew up in Burlingame, California. More...
  • Fisher, William Fisher, Dr William Frederick (1946-) American physician mission specialist astronaut. Flew on STS-51-I. Was married to astronaut Anna Fisher. More...
  • Lounge Lounge, John Michael 'Mike' (1946-) American geophysicist mission specialist astronaut. Flew on STS-51-I, STS-26, STS-35. Grew up in Burlington, Colorado. Flew 99 combat missions in Vietnam. More...
  • Covey Covey, Richard Oswalt 'Dick' (1946-) American test pilot astronaut. Flew on STS-51-I, STS-26, STS-38, STS-61. Grew up in Fort Walton Beach, Florida, son of an Air Force officer. Flew 339 combat missions during two tours in Southeast Asia More...

Associated Countries
Associated Spacecraft
  • Discovery American manned spaceplane. 39 launches, 1984.08.30 to 2011.02.24. More...

See also
Associated Manufacturers and Agencies
  • NASA American agency overseeing development of rockets and spacecraft. National Aeronautics and Space Administration, USA, USA. More...
  • NASA Houston American agency overseeing development of rockets and spacecraft. Houston, Houston, USA. More...

Associated Programs
  • STS The Space Transportation System (Space Shuttle) was conceived originally as a completely reusable system that would provide cheap, routine access to space and replace all American and civilian military launch vehicles. Crippled by technological overreach, political compromise, and budget limitations, it instead ended up costing more than the expendable rockets it was to have replaced. STS sucked the money out of all other NASA projects for half a century. The military abandoned its use after the Challenger shuttle explosion in the 1980's. More...

Associated Launch Sites
  • Cape Canaveral America's largest launch center, used for all manned launches. Today only six of the 40 launch complexes built here remain in use. Located at or near Cape Canaveral are the Kennedy Space Center on Merritt Island, used by NASA for Saturn V and Space Shuttle launches; Patrick AFB on Cape Canaveral itself, operated the US Department of Defense and handling most other launches; the commercial Spaceport Florida; the air-launched launch vehicle and missile Drop Zone off Mayport, Florida, located at 29.00 N 79.00 W, and an offshore submarine-launched ballistic missile launch area. All of these take advantage of the extensive down-range tracking facilities that once extended from the Cape, through the Caribbean, South Atlantic, and to South Africa and the Indian Ocean. More...

STS-51-I Chronology


1985 August 27 - . 10:58 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC39A. LV Family: Shuttle. Launch Vehicle: Shuttle. LV Configuration: Space Shuttle STS-27/51-I.
  • STS-51-I - . Call Sign: Discovery. Crew: Covey; Engle; Fisher, William; Lounge; van Hoften. Payload: Discovery F06 / Syncom-4 4 [Orbus-7S] / Aussat A1. Mass: 19,952 kg (43,986 lb). Nation: USA. Related Persons: Covey; Engle; Fisher, William; Lounge; van Hoften. Agency: NASA Houston. Program: STS. Class: Manned. Type: Manned spaceplane. Flight: STS-51-I. Spacecraft: Discovery. Duration: 7.10 days. Decay Date: 1985-09-03 . USAF Sat Cat: 15992 . COSPAR: 1985-076A. Apogee: 364 km (226 mi). Perigee: 351 km (218 mi). Inclination: 28.5000 deg. Period: 91.70 min. Manned five crew. Launched Aussat 1, ASC 1, Leasat 4; repaired Leasat 3. Payloads: Deploy ASC (American Satellite Company)-1 with Payload Assist Modue (PAM)-D. Deploy AUSSAT (Australian communications satellite)-1 with PAM-D. Deploy Syncom IV-4 communications satellite with its unique stage. Retrieve Leasat-3 communications satellite, repair and deploy by extravehicular activity (EVA) astronauts. Physical Vapor Transport Organic Solids (PVTOS) experiment.

1985 August 31 - .
1985 September 1 - .
1985 September 3 - .
Home - Browse - Contact
© / Conditions for Use