“Packard 1A-2500”的意思、由来-开放百科全书

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Packard 1A-2500

释义

Applications
Variants
Engines on display
Specifications (1A-2500)
See also
References
Notes Bibliography
External links

name = 1A-2500

image = File:Packard 3A-2500 USAF.jpg

caption = A preserved Packard 3A-2500 on display at the National Museum of the United States Air Force
}}{{Infobox Aircraft Engine

type=Liquid-cooled V12 engine

manufacturer=Packard

national origin= United States

1924}}

major applications=

number built = 258

program cost =

unit cost = $19,375 (Geared 3A-2500)

developed from =

developed into =

variants with their own articles =
}}

The Packard 1A-2500 is an American V-12 liquid-cooled aircraft engine designed by Packard in 1924 as a successor to the World War I-era Liberty L-12.^[1] Five aero variants were produced, of which the 3A-2500 was the most numerous. Three marine versions, used most prominently in American World War II PT-boats, the 3M-2500, 4M-2500, and 5M-2500, were also derived from it.

Applications

Boeing TB
Heinkel HE 8
Martin T3M
Naval Aircraft Factory PN
Huff-Daland LB-1
PT boats - marine versions of the 3M/4M/5M-2500
Packard-Bentley Vintage car

535 4M-2500 engines with W-8 modification were supplied to the USSR for torpedo boats and sub-chasers under Lend-Lease

Variants

1A-2500: 1924, 800 hp. Six built.

2A-2500

1925, 800 hp. 75 built.

2A-2540: ? Huff-Daland XHB-1

3A-2500: 1926, Geared propeller drive option, 800 hp. 175 built.

4A-2500: 1927, fitted with a supercharger, 900 hp. One built.

5A-2500: 1930, experimental use only, 1500 hp. One built.

3M-2500: Marine version

4M-2500: Marine version, 1200 hp (895 kW), subsequently upgraded in stages to 1500 hp (1,150 kW).

5M-2500: Marine version, larger supercharger, aftercooler, and power output of 1850 hp

Engines on display

A Packard 3A-2500 is on display at the National Museum of the United States Air Force.

Specifications (1A-2500)

{{pistonspecs
|
|ref=Aircraft Engine Historical Society^[2] and Race With the Wind By Birch Matthews{{citation needed|date=December 2010}}
|type=12-cylinder V engine
|bore={{convert|6+3/8|in|mm|abbr=on}}
|stroke={{convert|6+1/2|in|mm|abbr=on}}
|displacement={{convert|2490|cuin|L|abbr=on}}
|length=
|diameter=
|width=
|height=
|weight={{convert|1120|lb|kg|abbr=on}}
|valvetrain=Four valves per cylinder, overhead camshaft
|supercharger=
|turbocharger=
|fuelsystem=
|fueltype=Petrol
|oilsystem=
|coolingsystem=Liquid-cooled
|power={{convert|850|hp|kW|abbr=on}} at 2,500 rpm
|specpower= 0.33 hp/in³ (15.2 kW/L)
|compression=
|fuelcon=
|specfuelcon=
|oilcon=
|power/weight=0.76 hp/lb (1.25 kW/kg)
}}

References

Notes

1. ^Gunston 1989, p.109.
2. ^Aircraft Engine Historical Society - Packard {{webarchive|url=https://web.archive.org/web/20150325070543/http://enginehistory.org/Packard/StatsAllPackardAero.pdf |date=2015-03-25 }} Retrieved: 30 January 2009

Bibliography

Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. {{ISBN|1-85260-163-9}}
[https://web.archive.org/web/20150325070543/http://enginehistory.org/Packard/StatsAllPackardAero.pdf Aircraft Engine Historical Society - Packard Engines]
Matthews, Birch. Race With the Wind. Osceola, WI. MBI Publishing, 2001. {{ISBN|0-7603-0729-6}}

External links

Packard 3A-2500 – National Museum of the United States Air Force

2 : Aircraft piston engines 1920–1929|Packard aircraft engines

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