The Muniz M-9 was a two-seat training biplane with tandem open cockpit and powered by a 200 hp (149 kW) 130 hp (197 kW) de Havilland Gipsy Six engine.

[1] Designed by Lieutenant-Colonel Antônio Muniz, a serving officer in the Brazilian Air Force, as an advanced trainer and was a development of his earlier M-7 primary trainer.

20 more aircraft were ordered in September 1940, but the de Havilland Gipsy Six engines were unavailable due to World War II.

190 HP Ranger L-440 6-440C-4 engines were substituted, resulting in delayed deliveries.

Data from Jane's All the World's Aircraft 1938[4]General characteristics Performance