Curtiss Twin JN

The Curtiss Twin JN, retrospectively the Model 1B and also called the JN-5, was an experimental biplane that Curtiss Aeroplane and Motor Company built for the United States Army Air Service and designed for observation missions. It was based on the successful JN-4 and used the same wing structure, but the wingspan was extended by enlarging the centre section, and lateral control came from the tail of a Curtiss R-4. Two 90 hp Curtiss OXX-2 engines were mounted between the wings. One aircraft was also evaluated by the United States Navy as a twin-float seaplane. It was designed around the Army role of observation, and it kept the Jenny wing structure while carrying twin engines.