Model Variants (Including Prototypes)
NA-16 - Prototype Model Designation by North American; open two-seat cockpit; fixed undercarriage.
NA-18 - North American Designation for modified prototype model; enclosed glazed cockpit canopy.
NA-26 - Secondary Model Designation featuring modifications for the "Basic Aircraft" competition of the USAAC.
BC-1 - Initial Production Models for USAAC use of which 180 were produced.
BC-1A - 92 produced of this model.
BC-2 - At least three produced of this model.
AT-6 - Redesignation to more standard "Advanced Trainer" convention by the USAAC; based on the BC-1A model; featured straightened rudder and "squared-off" wingtips.
Harvard II - RAF model designation for the base AT-6.
AT-6A - Based on NA-77 model design; fitted with Pratt & Whitney R-1340-49 Wasp radial piston engine.
AT-6B - Gunnery Training Model; fitted with R-1340-AN-1 engine.
AT-6C - Based on the NA-88 model design.
AT-6D - Improved electrical systems.
AT-6F - Based on the 121 model design for USAAF.
SNJ - US Navy Designation; Six variants of this model produced for British export; based on the AT-6.
SNJ-1 - US Navy conversion model for use on carriers; 16 produced.
SNJ-2 - Similar to SNJ-1 but modified with a different powerplant.
SBJ-3 - Naval equivalent to the AT-6A.
SNJ-4 - Naval equivalent of the AT-6C.
SNJ-5 - Naval equivalent of the AT-6D.
SNJ-6 - Naval equivalent of the AT-6F.
"Harvard" - Four variants of this model produced for British and Commonwealth export; based on the AT-6.
Harvard I - Initial Royal Air Force delivery models of which 400 were produced.
Harvard IIA - RAF equivalent of the AT-6C.
Harvard IIB - Canadian-produced model based on the AT-16; supplied to Fleet Air Arm, the RAF and the RCAF.
Harvard III - RAF equivalent of the AT-6D.
Harvard 4 - RAF equivalent of the AT-6F.
AT-16 - Canadian-produced model fitted with R-1340-AN-1 and supplied to the USAAF.
BT-9 - Fitted with R-1340 engine generating 600 horsepower; non-retractable landing gear.
"BT-14" - Fitted with Pratt & Whitney R-985 powerplant capable of 400hp.
"Yale" - One variant produced for Canadian export based on the BT-14 model.
T-6 "Mosquito" - Forward Air Control Model.