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The Army and Navy then ordered a newer model of land-based aircraft known as the Model J and Model N trainers respectively. Each branch had specific uses for the trainers, however, neither could agree on a single airplane, a necessity during the budget constraints of the war. To streamline the production and more easily fulfill its military contracts, the Curtiss Aeroplane and Motor Company decided to merge the best features of both into a single Curtiss airplane that was capable of meeting the demands of the Allied Powers. What came about was the design of the JN-4 biplane, also known as The Jenny.
The Jenny featured a Deperdussin control wheel, one of the first of its kind, with a twin seat configuration. Both the student and the instructor could pilot the plane. The biplane had a 90 horsepower Curtiss OX-5 V8 engine that was capable of attaining speeds up to 75 miles per hour (121 km/h) and could reach altitudes of 6,500 feet (2,000 m). In total, 6,813 models of The Jenny were constructed, leaving a huge surplus at the end of the war. The availability of the model and stability of the aircraft made it ideal for the civilian market, particularly stunt flying through the 1930s.
Above left: The Jenny JN-4. (Supplied by George Johnson, Aviation Section, US Army Signal Corps; Public Domain; http://upload.wikimedia.org/wikipedia/commons/7/74/Flying_jenny_cropped.jpg)