The Curtiss JN-4 Jenny is a biplane that was widely used during and after World War I. Designed by the Curtiss Aeroplane Company, it became one of the most popular training aircraft of its time. The Jenny is known for its simple design, which made it easy to fly and maintain, helping to train thousands of pilots. With a wingspan of 43 feet and a top speed of around 75 miles per hour, the Jenny was powered by a OX-5 V-8 engine. Its versatility allowed it to be used for various purposes, including mail delivery and barnstorming, contributing to the growth of civil aviation in the United States.