N-1M prototype
It was a technology demonstrator aircraft built in the early 1940s to provide that a flying wing would fly.
The prototype was a 45 per cent scaled down version of the Northrop N-1 medium bomber project. It was built in wood/plywood and powered by two 65 hp. Lycoming 0-146 engines.
The N-1M had drooped wingtips to improve directional stability and elevons which combined the functions of elevators and ailerons.
The wing swept could be varied (in the ground) from 6 to 12-degrees and the wing tips anhedral angle from 0 to 30-degrees.
Between July 1940 and December 1941, the prototype conducted 200 flying tests that showed that, in a gentle dive, the Northrop flying wing would accelerate at a much faster rate than any other contemporary aircraft.
During testing it was determined that the wings with 30-degrees wings swept and the wing tips with 0 degrees anhedral were the most effective aerodynamic configuration.
Technical data
Wingspan: 11.80 m (38.7 ft), length: 5.47 m (18 ft), height: 1.50 m (4.9 ft), wing area: 20.10 sq. m (223 sq. ft), max weight: 1,769 kg (3,905 lbs), max speed: 232 mph (373 km/h), ceiling: 1,200 m (3,936 ft), range: 480 km (772 miles).