The CAP-4 Paulistinha was a military and civilian trainer aircraft built in Brazil during the 1930s and 40s. It was originally developed by Empresa Aeronáutica Ypiranga (EAY) as an unlicensed copy of the Taylor Cub powered by a Salmson 9Ad radial engine. It featured a high strut-braced wing two enclosed tandem seats and a steel-tube fuselage with fabric covering. Its tailwheel undercarriage was not retractable.
Made by Companhia Aeronáutica PaulistaEmpresa Aeronáutica Ypiranga.