Space Shuttle Enterprise, OV-101, was NASA’s first shuttle orbiter, built as a full-scale test vehicle rather than for spaceflight. Rolled out in 1976 after construction began in 1974, it lacked main engines, a functional heat shield, and many operational systems, so it was used for atmospheric and structural testing instead. In 1977, carried aloft on a modified Boeing 747, it made free flights that validated shuttle handling and revealed problems to fix before orbital missions. Enterprise was later used in ground vibration tests and in studies tied to later shuttle decisions and accident investigations. It ultimately became a museum artifact, reflecting its central role in proving the shuttle concept.

Photo: Wikipedia · Public domain

Photo: Wikipedia · Public domain

Photo: Wikipedia · Public domain

Photo: Wikipedia · Public domain

Photo: Wikipedia · Public domain

Photo: Wikipedia · Public domain

Photo: Wikipedia · Public domain

Photo: Wikipedia · Public domain

Union City, New Jersey · USA