| 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.
Design and development
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.
Variants
- Pup
 - Keystone prototype, one built.
 - XNK-1
 - Prototypes for Naval variant of Pup, three built.
 - NK-1
 - Production aircraft with minor changes, 16 built.
 
Operators
Specifications (NK-1)
General characteristics
- Crew: 2
 - Length: 26 ft 6 in (8.08 m)
 - Wingspan: 37 ft 0 in (11.28 m)
 - Powerplant: 1 × Wright R-790 Whirlwind , 220 hp (164 kW)
 
Performance
- Maximum speed: 116 mph (186 km/h, 101 kn)
 - Range: 375 mi (603 km, 326 nmi)
 
References
- Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.
 - The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.
 - Andrade, John (1979). U.S.Military Aircraft Designations and Serials since 1909. Midland Counties Publications. ISBN 0-904597-22-9.
 
External links
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