CASA 1.133 Jungmeister

The CASA 1.133 was the Spanish licence-built version of the Bücker Bü 133 Jungmeister, a single-seat aerobatic biplane that was developed from the Bü 131 Jungmann and served the Luftwaffe as an advanced trainer in the 1930s. Construcciones Aeronáuticas SA (CASA) built twenty five of them for the Spanish Air Force between 1940 and 1942 under the designation CASA 1-133L. The first aircraft were powered by the Hirth HM506 inline engine, and they were later re-engined with Sh 14 radial engines. They served alongside 22 German-built Bü 133C aircraft that the Spanish service already held. A Spanish-built example survives in the Museo del Aire in Madrid, and Spanish plans were later the source used by an American pilot who tried to restart Jungmeister production in Germany in the 1960s.