STS-51-D
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| Mission Insignia |
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| Mission Statistics |
| Mission: | STS-51-D |
| Shuttle: | Discovery |
| Launch Pad: | 39-A |
| Launch: | April 12, 1985, 8:59:05 a.m. EST |
| Landing: | April 19, 1985,8:54:28 a.m. EST, Runway 33, Kennedy Space Center, Fla. |
| Duration: | Six days, 23 hours, 55 minutes, 23 seconds |
| Orbit Altitude: | 285nm |
| Orbit Inclination: | 28.5 degrees |
| Miles Traveled: | 2,889,785 |
| Crew photo |
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STS 51-D was the sixteenth flight of a Space Shuttle and the fourth flight of Discovery. It conducted the fifth landing at Kennedy Space Center.
Crew
Mission Parameters
Space walk
- Hoffman and Griggs - EVA 1
- EVA 1 Start: April 16, 1985
- EVA 1 End: April 16, 1985
- Duration: 3 hours, 06 minutes
Mission Highlights
TELESAT-l (ANIK C-1) communications satellite deployed, attached to Payload Assist Module (PAM-D) motor. SYNCOM IV-3 (also known as LEASAT-3) deployed. but spacecraft sequencer failed to initiate antenna deployment, spin.up and ignition of perigee kick motor. Mission extended two days to make certain sequencer start lever in proper position. Griggs and Hoffman performed space walk to attach Flyswatter devices to remote manipulator system. Seddon engaged LEASAT lever using remote manipulator system but post deployment sequence did not begin. Other payloads: Continuous Flow Electrophoresis System (CFES) III, flying for sixth time; two Shuttle Student Involvement Program (SSIP) experiments; American Flight Echocardiograph (AFE); two Getaway Specials; Phase Partitioning Experiments (PPE); astronomy Photography verification test; medical experiments and "toys in space," an informal study of the behavior of simple toys in weightless environment, with results to be made available to school students. Extensive brake damage and blown tire during landing prompted landing of future flights at Edwards Air Force Base until implementation of nose wheel steering.
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