Boeing XP-7

Boeing XP-7


The Boeing XP-7 was a prototype United States biplane fighter of the 1920s.

Development and design

The XP-7 started life as the last Boeing Model 15 (PW-9D), serial 28-41. It was then adapted to mount the 600 hp Curtiss V-1570 Conqueror engine. Labelled by Boeing as their Model 93, the XP-7's nose was shorter and deeper than that of the standard PW-9, and the craft was 75 pounds lighter overall.

It first flew in September 1928 and did well, with a 17 mph speed increase over the PW-9. However, despite a proposal to build an additional four P-7s, the design was at the very limits of its capabilities and somewhat outdated even by the time of its first flight. At the end of testing, the Conqueror engine was removed and the aircraft converted back into a PW-9D.


met or eng?=eng

length m=7.31
length ft=24
length in=0
span m=9.75
span ft=32
span in=0
height m=2.74
height ft=9
height in=0
wing area sqm=23.4
wing area sqft=252
empty weight kg=1,070
empty weight lb=2,358
gross weight kg=1,479
gross weight lb=3,260

eng1 number=1
eng1 type=Curtiss V-1570-1
eng1 kw=
eng1 hp=600
eng2 number=
eng2 type=
eng2 kw=
eng2 hp=

max speed kmh=270
max speed mph=167.5
cruise speed kmh=216
cruise speed mph=134
range km=402
range miles=250
endurance h=
endurance min=
ceiling m=6,797
ceiling ft=22,300
g limits=
roll rate=
climb rate ms=7.2
climb rate ftmin=1408

armament1=1x .50in machine gun
armament2=1x .30in machine gun
armament3=125lb (57kg) bombs

similar aircraft=
* List of military aircraft of the United States
* List of fighter aircraft



* Lloyd S. Jones, "U.S. Fighters" (Aero Publishers, Inc., 1975) pp. 32-33 ISBN 0-8168-9200-8

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