What is the name of the first commercially successful jet airliner?

• A. Boeing 707
• B. McDonnell Douglas DC-8
• C. Lockheed L-1049 Super Constellation
• D. de Havilland Comet

Answer: (D)

The first commercially successful jet airliner is the de Havilland Comet. It made its inaugural flight in 1949 and was the first aircraft to incorporate jet propulsion for civil aviation, thus fundamentally transforming air travel. The Comet was notable for its sleek design and ability to fly at higher altitudes and speeds compared to propeller-driven aircraft.

Despite early setbacks, including operational issues leading to hull losses, the Comet set the stage for future jetliners and paved the way for commercial jet travel as we know it today. Its introduction marked the beginning of the jet age, allowing airlines to provide faster service across greater distances, which eventually became the norm in the aviation industry.

The other aircraft listed represent significant developments in aviation history but did not achieve the same level of commercial impact as the Comet in terms of introducing jet travel to the public on a large scale.