Boeing XP-4

XP-4
Boeing XP-4 during trials
General information
TypeFighter
National originUnited States
ManufacturerBoeing
Number built1
History
First flight1927
Developed fromBoeing Model 15

The Boeing XP-4 was a prototype American biplane fighter of the 1920s. It was grounded permanently after just 4.5 hours of flight testing.

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