Designed in 1934 in response to a Spanish Air Force requirement as part of its modernisation programme, the Chirta was a conventional sesquiplane, constructed of wood and metal and seating the student and instructor in tandem open cockpits.
The Loring R-3 was a 1920s Spanish two-seat sesquiplane reconnaissance aircraft designed by Comandante (Major) D. Eduardo Barron and built by Dr. Jorge Loring's company — Talleres Loring.