Boeing Model 247
Boeing Model 247, considered
the first such aircraft to fully all-metal
semimonocoque construction, a fully cantilevered wing and retractable
landing gear.
Boeing Model 247 was an early United States airliner, considered the first such aircraft to fully incorporate advances such as all-metal semimonocoque construction, a fully cantilevered wing and retractable landing gear.
Pan Am Boeing 707.
The Boeing 377 Stratocruiser was a large long-range airliner developed from the C-97 Stratofreighter military transport, a derivative of the B-29 Superfortress. The Stratocruiser’s first flight was on July 8, 1947.[2] Its design was advanced for its day, its innovative features included two passenger decks and a pressurized cabin, a relatively new feature to transport aircraft. It could carry up to 100 passengers on main deck plus 14 in lower deck lounge; typical seating was for 63 or 84 passengers or 28 berthed and five seated passengers. (http://en.wikipedia.org/wiki/Boeing_377_Stratocruiser)