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Technical Specifications
Two-seater for training with low wing and fixed landing gear
Date first flight
April 1936
12,80 m 
8,39 m 
4.13 m 
Wing Area
Empty Weight
1470 Kg 
Max. Takeoff Weight
2041 Kg 
Cruising Speed
235 km/h. 
Maximum Speed
273 km/h 
Climbing Speed
260 m/mn
Service ceilling
2 men
1 Radial engine 9 cyl WRIGHT WHRILWIND E-975-E3 of 400 Hp
No armament



222 NAA-57 and 111 NAA64 were delivered and received before the Armistice.

To date, of the 333 aircrafts manufactured, 34 are listed in the list below :


The USSAC (U.S Army Air Corps) ordered in 1936 266 copies of the BT-9 series. This aircraft, whose first flight took place in April 1936, is intended to train American pilots. It is a modern aircraft in metal structure covered with canvas and metal. it has a fixed landing gear and is equipped with a Wright E-975 engine of 400ch.

Soon, foreign countries are interested in the aircraft. Thus France, in search of a modern machine to train its pilots, will pass a first contract on February 15, 1939 concerning the purchase of 237 NA-57, derived from the American BT-9B and 345 engines. 30 of these devices are intended for Naval Aeronautics. From the summer of 1939, the appliances will be delivered dismantled in the box, to be assembled in the factory SNCAO of Nantes. 40 copies will be mounted in Casablanca. In France, it takes the NAA-57 designation with two variants: ET2 for the two-seater training or P2 for two-seater improvement. Naval Aeronautics will only receive its first aircraft in March 1940.

A second order was placed in October 1939 for the acquisition of 230 NAA-64 and 275 engines. These aircrafts are a more modern evolution of the NAA-57. Thus the coating is entirely metallic and it receives a Pratt & Whitney of 450ch. The drift is modified and adopts a triangular pattern that will be found later on the T-6.

At the end of April 1940, 131 copies of NAA-57 were taken into account, distributed in schools in metropolitan France (101 copies) and Morocco (30). In May, there are 191 aircrafts, 127 of which are in schools. At the armistice, 222 copies had been received. Part will be used by the Vichy Air Force as a liaison plane, and about fifty aircraft will be captured by the Germans in November 1942 after the invasion of the Free Zone. These will end up in flight school. There are still a hundred planes in North Africa: they will be used until 1945 before being replaced by more modern appliances

Of the 230 NAA-64 ordered, only 111 will be received at the Armistice. Distributed in the Vichy Air Force, the survivors will again be captured by the Germans in November 1942 to serve as a flying school where they will be particularly appreciated.

The rapid end of the fighting will not allow the United States to deliver all the aircraft ordered. The remainder of the order will be delivered to Canada which will pay them in its schools of piloting where they will train in particular the English pilots.

Despite the unfavorable course of events, the French government had ordered in June 1940, 450 NA-76, with retractable landing gear, very close to the T-6. All aircrafts will be built, but will not be delivered. They will enter service in the RAF under the name of Harvard II.



Aircraft derived from the American North American BT-9B. Tandem training monoplane with low wing and careened fixed landing gear, it is built around a metal structure. It has a mixed coating: fuselage, rear of firewall and moving surfaces, and metal covering for the rest of the unit. It is powered by a Wright Whrilwind E-975 53 of 400ch


The NAA-64 comes from the American BT-14. The aircraft is completely covered with metal, and the rear section is revised with a retracted drift to compensate for the forward shift of the new Pratt & Whitney R-985 450hp engine. The rudder adopts a triangular shape, which will become that of the best known T6.



1) Editions LELA PRESSE ; Revue "Avions" No62 - 63 - 64
- Du NA-16 au T6 : Les biplaces d'Entrainement North Américan


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