The Muniz M-7 was a two-seat primary training biplane with tandem open cockpit and powered by a 130 hp (197 kW) de Havilland Gipsy Major engine. Designed by Lieutenant-Colonel Antonio Muniz, a serving officer in the Brazilian Air Force, as a primary trainer.[1] It was the first production aircraft designed in Brazil.[2] The M-7 prototype was built at the Central Aeronautics Park (Afonsos Air Force Base) and was first flown in October 1935. Production aircraft were built by Companhia Nacional de Navegação Aérea (CNNA) at Viana Island, (Rio de Janeiro). 11 aircraft were flown from 1937–1941 by the Military Aviation School based in Campo dos Afonsos, with the remaining 17 aircraft being sent to flying clubs.[3][2]