Keystone NK explained

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

United States Navy

References

Book: Taylor, Michael J. H. . Jane's Encyclopedia of Aviation . 1989 . Studio Editions . London .
Book: The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.
Book: Andrade, John . U.S.Military Aircraft Designations and Serials since 1909. 1979 . Midland Counties Publications. 0-904597-22-9.

External links

Aerofiles