Boeing 757-200 Continental AirlinesBoeing 757 200 United Airlines airplane model. Boeing considered a number of proposals for a successor to the 727 tri jet during the 1970s, with many of these designs featuring the nose and T tail of the earlier jet. It was not until later in that decade however that Boeing settled on a more conventional design featuring the same cross section as the 727 (not to mention the 737, 707 and 720) but with the fuselage considerably longer in length, an all