Production aircraft were exclusively powered by the Hispano-Suiza 12Y 12-cylinder water-cooled engine, rated to produce a maximum of 850 hp, which was built under license by Avia. The total fuel capacity was 70 gallons (320 litres); a combined cooler and oil tank was installed beneath the fuselage, while a water-based radiator was also set below the engine. Engine ignition was provided via the cockpit, along with automated fire-fighting equipment. Other cockpit equipment included a radio set, oxygen provision, and an adjustable seat and cockpit cover. Early-built aircraft featured an open cockpit, while later-built examples were furnished with an enclosed cockpit.