The Boeing 377, sometimes called the Stratocruiser, was an airliner made by Boeing after World War II. It was made from the C-97 Stratofreighter, which was a type of Boeing B-29 Superfortress used to move troops around. The Stratocruiser first took off on July 8, 1947.
The Stratocruiser had four piston engines. It had a pressurized cabin and two decks. Airlines could fly for much longer with the Stratocruiser, to places like Hawaii.
However, the Stratocruiser was a lot more expensive than the Douglas DC-6 and Lockheed Constellation. Only 55 Stratocruisers were made for airlines.