Pratt and Whitney R-985 Wasp Junior(I desaturated the yellows in Photoshop to minimize the distractions.)The R-985 air-cooled engine was first used by the Air Corps in 1932. At that time, it was rated at 300 horsepower. By 1934 it had been sufficiently improved so that it delivered 350 horsepower and two years later it was rated at 400 horsepower. Further refinements were made and during World War II it produced 450 horsepower. Through the years the R-985 was used in thousands of military aircraft of various types in addition to being installed in numerous civilian types of aircraft.This engine will go on the Fargo Air Museum's Vultee BT-13, which is currently undergoing restoration. This engine just returned from overhaul and cost $28,000 to rebuild.SPECIFICATIONSModel: R-987-AN-14BType: 9-cylinder, air-cooled, supercharged radialDisplacement: 985 cu.in.Max. RPM: 2,300Max. HP: 450Cost: $6,000