North American NA-57 is a version of the BT-9 aircraft exported to France before 1940. The BT-9 was a two-seater low-wing training plane with a fixed landing gear and classic tail. The prototype flight took place in April 1936. The power unit was a 400HP Wright R-975-53 engine. Many versions of this aircraft were created, including BT-14, NA-64 Yale or BT-9A. Technical data (BT-9 version): length: 8.5 m, wingspan: 12.8 m, height: 4.1 m, maximum speed: 273 km / h, maximum range: 1400 km, maximum ceiling 6000 m, armament: permanent - no.
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