| Keystone NK | |
|---|---|
 | |
| Role | Biplane trainer |
| National origin | United States |
| Manufacturer | Keystone Aircraft |
| First flight | 1928 |
| Introduction | 1930 |
| Primary user | United States Navy |
| Number built | 20 |
The Keystone NK or Keystone Pup was a two-seat biplane trainer built by Keystone Aircraft for the United States Navy.
The NK was an open-cockpit two-seat biplane with a convertible wheel or float landing gear. It was powered by a 220 hp (164 kW) Wright R-790 Whirlwind. The company prototype designated the Pup was entered into a United States Navy design competition for a trainer and was awarded a contract for three prototypes designated XNK-1. Following evaluation a production batch of 16 was ordered designated NK-1 which were delivered during 1930.
United States General characteristics
Performance
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