Ranger 21 was designed in 1957 by Carl Goldberg and produced as a kit until the late 1970’s. It was intended to help new modelers achieve success in building model airplanes that also flew well. The BMJR kit, designed by Paul Bradley, is a replica of the original. Some structural changes have been made, but the plan form is that of the original. Changes from the original include a larger prop, one piece fuselage sides, and a vacuum formed nose piece has been replaced with a removable laminated balsa nose block to aid in winding and add structural strength. Model is of all sheet balsa construction and has a 21” span with 76 sq. in of area.