“Curtiss YP-20”的意思、由来-开放百科全书

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Curtiss YP-20

释义

Design and development
Operators
Specifications (original YP-20)
Notes
References

name=Curtiss YP-20

image= File:Curtiss YP-20.jpg

caption=Parked YP-20

}}{{Infobox Aircraft Type

type=Biplane fighter

manufacturer=Curtiss Aeroplane and Motor Company

designer=

first flight=

introduced=

retired=

status=

primary user=United States Army Air Service

more users=

produced=

number built=1

variants with their own articles=
}}

Curtiss YP-20 was a United States Army Air Service biplane fighter project developed by Curtiss.

Design and development

In 1929, three Curtiss P-11 Hawks were ordered with 600 hp (447 kW) Curtiss H-1640 Chieftain engines. These proved a failure, and before completion, the third was converted to use a 9-cylinder 575 hp (429 kW) Wright Cyclone, being completed as the YP-20. Testing with the R1820 was prolonged, so the Army's intention to promptly switch to a Curtiss V-1570 Conqueror engine and redesignate the aircraft XP-22 was dropped; another P-11 was chosen for that instead.

Except for the engine change and its Townend ring cowling, the YP-20 was not drastically different from the P-6 from which both it and the P-11 derived, though the YP-20 had more fin and less rudder area,^[1] and featured a steerable tailwheel, rather than the original skid.^[2] Later, a crankcase cover, gear strut fairings, and wheel pants were added.

In June 1931, the AAC held a competition to evaluate the P-6, P-12, XP-22, and YP-20. The XP-22 came out the winner, but the YP-20 was given a nose and landing gear graft from the XP-22, becoming the XP-6E (P-6E prototype). With the addition of a supercharger and an enclosed cockpit, it was tested as the XP-6F.

Operators

{{USA}}

United States Army Air Service

Specifications (original YP-20)

{{aircraft specifications
|plane or copter?= plane
|jet or prop?= prop
|ref=U.S.Fighters, Lloyd Jones, Aero Publishers 1975.
|crew= one pilot
|capacity=
|length main= 23 ft 9 in
|length alt=
|span main= 31 ft 6 in
|span alt= 9.6 m
|height main= 8 ft 10 in
|height alt= 2.69 m
|area main= 252 ft²
|area alt= 23.41 m²
|airfoil=
|empty weight main= 2,447 lb
|empty weight alt= 1,110 kg
|loaded weight main=
|loaded weight alt=
|useful load main=
|useful load alt=
|max takeoff weight main= 3,233 lb
|max takeoff weight alt=
|more general=
|engine (prop)= R-1820 Cyclone
|type of prop= air-cooled 9-cylinder radial engine
|number of props=1
|power main= 575 hp
|power alt= 429 kW
|power original=
|max speed main= 215 mph
|max speed alt= 187 kn, 346 km/h
|cruise speed main=
|cruise speed alt=
|never exceed speed main=
|never exceed speed alt=
|stall speed main=
|stall speed alt=
|range main= 285 mi
|range alt= 248 nmi, 459 km
|ceiling main= 24,700 ft
|ceiling alt= 7,529 m
|climb rate main=
|climb rate alt=
|loading main=
|loading alt=
|thrust/weight=
|power/mass main=
|power/mass alt=
|more performance=
|armament=2 × 0.30 in (7.62 mm) M1919 Browning machine guns (cowl)
|avionics=
}}

Notes

1. ^Fitzsimons, Bernard, ed. Illustrated Encyclopedia of Weapons and Warfare (London: Phoebus, 1978), Volume 12, p.1255.
2. ^Fitzsimons, p.1255.

References

Fitzsimons, Bernard, ed. Illustrated Encyclopedia of Weapons and Warfare. Volume 12, pp. 1255–6, "Hawk, Curtiss Models 34 and 35 (P-1 to P-6 and F6C". London: Phoebus Publishing, 1978.
Donald, David, ed. Encyclopedia of World Aircraft. Etobicoke, ON: Prospero Books, 1997.
Jones, Lloyd S. U.S. Fighters. Fallbrook, CA: Aero Publishers, 1975.

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