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The Keystone NK or Keystone Pup was a two-seat biplane trainer built by Keystone Aircraft for the United States Navy.

The Keystone NK or Keystone Pup was a two-seat biplane trainer built by Keystone Aircraft for the United States Navy.1
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...2

Made by Keystone Aircraft.

NK Keystone NK Pup Two-seat trainer. 1930. NP Spartan NP Trainer biplane. 201 built. Type: NP-1 Function: trainer Year: Crew: 2 Engines: 1 * 168kW Lycoming R-680-8 engine.3
Eng 1 Type
Wright R-790 Whirlwind
First Flight
1928
Eng 1 Kw
164
Range Km
603
Introduced
1930
Number Built
20
Crew
2
Span M
11
Primary user
Manufacturer
Range Miles
375
Max Speed Mph
116
Max Speed Kmh
186
Span In
Span Ft
37
National Origin
United States
Met Or Eng
eng
Length Ft
26
Eng 1 Hp
220
Eng 1 Number
1
Length In
6
Length M
8
Category

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