STS-51I

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STS-51I
Organization NASA-Office of Space Flight (United States)
Mission type Human Crew
Launch date August 27, 1985 (1985-08-27)
Launch vehicle Space Shuttle
Launch site Cape Canaveral, United States
COSPAR ID 1985-076A
Inclination 28.45 degrees
Experiments Here
Alternate Names STS 20,15992
Additional Information Here
Data Collection Here
Payload Mass Up 19988 kg
Payload Mass Down 6114.55 kg
Orbiter Discovery
Lift Off Mass 2,050,968.18 kg
Orbiter Weight at Liftoff 119,231.36 kg
Orbiter Weight at Landing 89,397.27 kg
Landed Runway 23 dry lake bed at Edwards Air Force Base, Calif.
Orbits of Earth 111
Orbital Altitude 190 nautical miles (218 statute miles)


Contents

Crew

  • Commander: Joe H. Engle
  • Pilot: Richard O. Covey
    • Payload Commander:
    • Mission Specialist 1: James van Hoften
    • Mission Specialist 2: William F. Fisher
    • Mission Specialist 3: John M. Lounge
    • Mission Specialist 4:
    • Mission Specialist 5:
    • Payload Specialist 1:
    • Payload Specialist 2:


ISS/Mir Crew Transport


Mission

STS 51-I was the sixth Discovery shuttle flight. On board were Joe Engle, Richard Covey, James Van Hoften, William Fisher, and John Lounge. Deployed during the mission were Aussat-1 (Australia), ASC 1 (American Satellite Corporation), and SYNCOM IV-4 (Hughes Corporation). A repair was made to SYNCOM IV-3 which was launched by STS 51-D in April 1985. 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 the time was spent retrieving, repairing and redeploying LEASAT-3, which was deployed on Mission 51-D. The Middeck Payload consisted of: Physical Vapor Transport Organic Solid Experiment (PVTOS). The mission duration was 170 hours 17 minutes 42 seconds.


EVA

Extravehicular Activity (EVA) conducted by James van Hoften and William Fisher during two spacewalks for a total of 11 hours, 46 minutes. EVA 1, 7 hours, 20 minutes; EVA 2, 4 hours, 26 minutes.


Payload

Deploy ASC (American Satellite Company)-1 with Payload Assist Module (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


Mission patch: