Basic Trainer BT-9 – 14

A student and instructor with a USAAC BT-9 at Randolph Field, Texas. The colours are off in the ad, as the fuselage should be blue. It is definitely a BT-9, not a BT-14. The square windscreen shape, as well as the engine scoops/vents, are dead giveaways that it’s a BT-9. I believe some BT-9’s had the fuselage fabric (at least the removable section) metalized later on in life to help with wear Shane Clayton

 

Originally this BT-9 should have been Blue not yellow.

 

BT-9

Basic Trainer with 400hp Wright R-975-7 Whirlwind and a new canopy. Dangerous stall resulted in a variety of unsuccessful fixes. 42 built.

BT-9A

Armed BT-9 with one cowl gun and one rear flexible gun, and modified canopy. 40 built.

BT-9B

Minor changes from BT-9, unarmed. 117 built. 1 modified as sole BT-9D which was modified as a prototype for BT-14 with new outer wing panels and other alterations.

BT-9C

Wright R-975-7, similar to the BT-9A with minor changes. 66 built

BT-9D

One prototype only, Intermediate step in the development of the BT-14.

Y1BT-10

600hp Pratt & Whitney R-1340-41. The first aircraft of a batch of BT-9C completed as Y1BT-10.

BT-10

The production version of Y1BT-10 – cancelled

BT-14

lengthened all-metal fuselage and new canopy, Pratt & Whitney R-985-25, 251 built.

BT-14A

27 BT-14s were re-engined with 400 hp (298 kW) Pratt & Whitney R-985-11.