After World War II, many military-surplus aircraft with Wasp Junior engines entered the civilian market. New designs based on the Wasp Junior were also introduced, such as the Sikorsky H-5 helicopter, the de Havilland Beaver, and Max Holste Broussard bush airplanes, and agricultural aircraft such as the Snow S-2B and S-2C, Grumman Ag Cat, and Weatherley 201.