STS-51-F (Spacelab 2) was the eighth flight of Space Shuttle Challenger, and the nineteenth shuttle flight.
The payload with most publicity was the Carbonated Beverage Dispenser Evaluation, which was an experiment where both Coca-Cola and Pepsi tried to make their drinks available to astronauts. Both fizzed excessively in the low cabin pressure.
Launch date: July 29, 1985, 21:00:00 UTC
Landing: August 6, 1985, 19:45:26 UTC