Hawker Siddeley HS-121 Trident 3B

The Trident, model DH121 or HS121, was a short/medium-range airliner designed by de Havilland in the 1950s, and built by the Hawker-Siddeley Group in the 1960s when de Havilland was merged with several other British aviation firms. Designed specifically to a British European Airways (BEA) requirement, it had limited appeal to other airlines and sold only in small numbers. It was an important airliner in Europe but high operational costs doomed it to a short lifespan. BEA's successor, British Airways chose to replace their fleet with the Boeing 737 and Boeing 757 in the late 1980s. In China the Trident remained in military service as a VIP and troop carrier to the mid-1990s.