The IMPA Tu-Sa (IMPA - Industria Metalurgica e Plastica SA) was a civil trainer developed in Argentina in the 1940s for aeroclub use. It was a conventional low-wing monoplane with wide-track fixed failwheel undercarriage. In service the aircraft demonstrated a number of serious and fundamental design flaws that led to a series of accidents and pilots joking that Tu-Sa stood for Todo Un Sarcófago Aéreo (Altogether an aerial coffin).
Made by Industrias Plasticas y Metalurgicas Argentinas.