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Packard 1A-2500

American V-12 liquid-cooled aircraft engine

Field	Value
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
engine_type	Liquid-cooled V12 engine
manufacturer	Packard
national_origin	United States
first_run	1924
number_built	258

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. 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 one-off race car
USSR World War II torpedo boats and sub-chasers, which were fitted with 535 4M-2500 engines with W-8 modification 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.
A Packard 3A-2500 is in storage at the National Air and Space Museum.
A Packard 3A-2500 is on display at the New England Air Museum.
A Packard 4M-2500 is on display at the Packard Proving Grounds Historical Site in Shelby Twp., Michigan.
A Packard Series 142 Diesel Model 1D-1700 is on display at the Packard Proving Grounds Historical Site in Shelby Twp., Michigan.
Three working Packard 5M-2500s are installed the only operational PT boat, Higgins PT-658 in Portland, Oregon.

Specifications (1A-2500)

| and start a new, fully-formatted line with -- |power/weight=0.76 hp/lb (1.25 kW/kg)

References

Notes

Bibliography

Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989.
Aircraft Engine Historical Society - Packard Engines
Matthews, Birch. Race With the Wind. Osceola, WI. MBI Publishing, 2001.

References

Gunston 1989, p.109.
(8 June 2015). "Packard 3A-2500".
"Packard 3A-2500 Geared Drive, V-12 Engine". Smithsonian Institution.
"Packard 3A-2500".
[http://www.enginehistory.org/Packard/StatsAllPackardAero.pdf Aircraft Engine Historical Society - Packard] {{webarchive. link. (2015-03-25 Retrieved: 30 January 2009)

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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