The Schweizer SGM 2-37 is a two-place, side-by-side, fixed gear, low wing motor glider. A total of twelve were produced between 1982 and 1988, including nine for the United States Air Force Academy, which designated it the TG-7A. The TG-7A was retired from USAFA service in April 2003. The basic airframe was later developed into the SA 2-37A and B covert surveillance aircraft. Development Schweizer had flown a Schweizer SGU 1-19 as a motor glider in 1946 without putting the design into production. In 1958 the company carried out a design study of a powered aircraft using the wings and tail of the 1-26 designated as the Schweizer SA 1-30, but after some test flying and modification it was not put into production. A two-seat version of the 1-30, the Schweizer SA 2-31 was completed in 1960 but not put into production due to competition in the light aircraft market. Both the 1-30 and 2-31 were designed as regular light aircraft and no further motorgliders were built by the company until 1982. The SGM 2-37 was designed at the request of the USAF for use at USAFA, in both the powered and glider trainer role. To save both money and development time the aircraft used a number of existing aircraft components: Nose, cowling, and engine installation adapted from the Piper PA-38 Tomahawk Wings adapted from the Schweizer SGS 1-36 Sprite, including extensions to bring it from the Sprite's to and leading edge cuffs to improve stall characteristics Tail from the Schweizer SGS 2-32 The design was intended to be available as a civil aircraft as well as a military aircraft. The USAF version was delivered with a Lycoming O-235-L2C 4-cylinder aircraft engine of . The civil version offered the same engine or an option of a Lycoming O-320 of or a Lycoming O-360 of . The aircraft is of all-metal aluminum monocoque construction. The engine cowling is made from fiberglass and plastics are employed in some of the nonstructural components. The 2-37 features a baggage compartment behind the side-by-side seating. The aircraft does not have flaps, but instead has top-and-bottom wing-mounted balanced divebrakes, similar to other Schweizer glider designs. Performance includes a cruise speed of 114 mph while burning 4 US gal per hour with the O-235 engine. The 17.9 aspect ratio wing provides a glide ratio of 28:1 with the propeller feathered, and a minimum sink speed of 3.16