Riding the back of a modified Boeing 747, Space Shuttle Enterprise ascends to 22,000 feet for her second “active-captive” test flight, with all systems powered up and a crew aboard (astronauts Joe Engle and Richard Truly). The combined vehicle reaches speeds of over 300 miles per hour, and angles for “dropoff” – for upcoming test flights in which the Enterprise will actually separate from the 747 and glide to its landing strip – are studied for future reference.
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