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For 1933 Packard reintroduced a twelve-cylinder engine, initially called the "Twin Six", then changing the name to "Packard Twelve," to align it with the rest of the Packard lineup. [6] This was the 10th Series and two models were on offer: the 1005 and the 1006 had wheelbases of 142 in (3,606.80 mm) and 147 in (3,733.80 mm).
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.
Due to the very long length of a straight-twelve engine, they are rarely used in automobiles. The first known example is a 7.2 litres (440 cu in) engine in the 1920 French Corona car; [1] however it is not known if any cars were sold. Packard also experimented with an automobile powered by an inline 12 in 1929. [2]
The Packard 1A-1500 was an American 12-cylinder liquid-cooled 60-degree Vee piston aircraft engine designed in 1924. [1] Test flown in the second prototype Douglas XO-2 , it proved to be unreliable. Only 29 engines were built.
Packard's engineering staff designed and built excellent, reliable engines. Packard offered a 12-cylinder engine—the "Twin Six"—as well as a low-compression straight-eight, but never a 16-cylinder engine. After WWII, Packard continued with their successful straight-eight-cylinder flathead engines. While as fast as the new GM and Chrysler ...
The Rolls-Royce Merlin is a British liquid-cooled V-12 piston aero engine of 27-litre (1,650 cu in) capacity. Rolls-Royce designed the engine and first ran it in 1933 as a private venture. Initially known as the PV-12, it was later called Merlin following the company convention of naming its four-stroke piston aero engines after birds of prey ...
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The Liberty L-12 is an American water-cooled 45° V-12 engine, displacing 1,649 cubic inches (27 L) and making 400 hp (300 kW), designed for a high power-to-weight ratio and ease of mass production. It was designed principally as an aircraft engine and saw wide use in aero applications.