STS-51F Mission Patch

Primary objective of the Spacelab-2 mission was to verify the performance of Spacelab's systems and to determine its interface capability with the Space Shuttle vehicle. 4 inches. 19th Space Shuttle Mission 8th Flight of Challenger Crew: C. Gordon Fullerton, Commander Roy D. Bridges, Jr., Pilot F. Story Musgrave, Mission Specialist Karl G. Henize, Mission Specialist Anthony W. England, Mission Specialist Loren W. Acton, Payload Specialist John-David F. Bartoe, Payload Specialist