1940 Northrop N-1M, NX28311

two 65 hp Lycoming O-145 then two 120 hp Franklins

NASM. Jan 2014.

Information from NASM

John K. "Jack" Northrop's dream of an all-wing aircraft became a reality on July 3, 1940, when his N-1M (Northrop Model 1 Mockup) first flew. Northrop was also the designer of famous aircraft such as the Lockheed Vega and Northrop Alpha. He believed that all-wing aircraft would be more efficient than conventional tailed aircraft encumbered with non-lifting components such as the fuselage and tail. Northop company crafts persons built the N-1M using plywood to cover a tubular steel airframe. The two 65-horsepower Lycoming engines that first powered the wing were later replaced with two 120-horsepower Franklins. The N-1M was always underpowered but the lessons learned when test pilots flew the wing led Northrop to build the XB-35 and YB-49 prototype heavy bombers.