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The Piper PT-1 was a 1940s American two-seat primary training monoplane designed and built by Piper Aircraft at Lock Haven. A low-wing tandem two-seat monoplane, the PT-1 was the first Piper aircraft to have a low-wing. It had a fabric covering over an all-metal fuselage frame and wooden spar wings and tail unit. The PT-1 had a retractable tailwheel landing gear and was powered by a 130 hp (97 kW) Franklin 6AC-2980D engine. No further aircraft were built. A four-seat development was designed as the Piper PWA-6 which did not go into production either.
The Meyers OTW was a 1930s United States training biplane designed by Allen Meyers and built by his Meyers Aircraft Company from 1936 to 1944.
The Neiva B Monitor, also designated B-2, is a Brazilian tandem two-seat glider aircraft designed and manufactured by Indústria Aeronáutica Neiva between 1945 and 1955 for primary training and general flying.
The St. Louis YPT-15 was an American two-seat primary training biplane, built by the St. Louis Aircraft Corporation for use by the United States Army Air Corps. 13 examples of the type were acquired, serving in the late 1930s.
The Kolb Kolbra and King Kolbra are a family of American tandem two seater, high wing, strut-braced, pusher configuration, conventional landing gear-equipped ultralight aircraft that are produced in kit form by New Kolb Aircraft of London, Kentucky and intended for amateur construction.
The Spezio Sport DAL 1 Tuholer is a two-place low-wing homebuilt aircraft using tube-and-fabric construction. A folding wing is incorporated to allow for trailering.
The PWS 3 was a Polish sport aircraft, developed in 1927 by PWS, which remained a prototype.
The Lemberger LD20b was a single-engine cantilever biplane designed to be easily towable behind a car. Built in Germany in 1971, it made several flights but did not enter production.
The TMM Avia T-10 Avia-Tor is a single engine two seat Ukrainian light aircraft, with a high wing and transparent blister cabin doors for extra visibility, designed to be robust enough for a range of applications.
The Shober Willie II is an American two-seat sporting or aerobatic aircraft designed and built by Shober Aircraft Enterprises. The aircraft was designed to be sold as plans for amateur construction.
The Praga E-40 was a single engine, two seat, biplane basic trainer, built in Czechoslovakia in the mid-1930s.
The Federal Aircraft CM-3 was an aircraft built by mechanics from the Ryan Company.
The St. Louis PT-LM-4 was a primary trainer design for use in the Civilian Pilot Training Program of World War II.
The Stits SA-5 Flut-R-Bug is a homebuilt aircraft designed by Ray Stits.
The Horikawa H-22B-3 is a simple, open frame, two seat primary trainer glider designed and built in Japan in the 1950s.
The IIL IS-8 was a two-seat sailplane designed by Iosif Șilimon and built in Romania in 1960. They served with Romanian gliding clubs.
The Gabriel P 6 was a Polish training aircraft and the P 7 a tourer. The difference between them was the wing configuration, chosen to optimise their speed range for their role, so the P 6 was a biplane and the P 7 a parasol wing aircraft.
The Rubik R-16 Lepke (Butterfly) was a single seat Hungarian training glider designed to follow the very similar but two seat Rubik R-15 Koma in a winch-launch training programme. The Lepke provided solo experience of the techniques learned with an instructor in an aircraft with similar handling characteristics. That done, the Lepke could be used as a standard trainer to take its pilot to C-certificate level. The pair were widely used by Hungarian glider clubs post-war, with sixty-five of each produced.
The Politechnika Warszawska PW-4 Pelikan was a motor-glider variant of the two seat Polish PW-3 Bakcyl glider. Only one flew.
The Itoh Emi 13 was a two seat Japanese trainer, designed for the Itoh flying school and introduced in two versions in 1920 and 1921.