Packard 1A-2500


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

;1A-2500:1924, 800 hp. Six built.
;2A-2500'''
;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, subsequently upgraded in stages to 1500 hp.
;5M-2500:Marine version, larger supercharger, aftercooler, and power output of 1850 hp

Engines on display