The Czech Moravan company achieved great success with its Zlin Treners in international aerobatic competitions and, in 1975, designed the Z-50L. This is a dedicated all-metal single seat aerobatic machine with a 260 hp Lycoming AEIO-540 engine. Nearly 100 were built and later variants had 300 hp Lycoming or 210 hp Avia engines and lighter airframes.