![]() ![]() ![]() Army decided it needed to source additional engine suppliers, choosing a version of the Ford GAA cut down from twelve cylinders to eight for various vehicle applications. With the approach of war, increasing orders for M4 Sherman tanks were causing supply issues with the 9-cylinder radial Wright R-975 Whirlwind engine used. However, it never went into production as an aircraft engine due to the United States Navy's decision to only use radial engines for its aircraft and the Army's contractual commitments to existing manufacturers. ![]() Available information suggests this design performed well. Everything was safety wired or staked with close attention to detail on every part. This engine was built to typical aircraft standards: it was light, high performance, and highly reliable. The intention of this design was to help Ford break into the anticipated large market for aircraft engines. It was a 60 degree V-12 of 1,650 cubic inch displacement with cylinder bore and stroke matching the Merlin aviation engine, using an aluminum block and head dual overhead camshafts, and four valves per cylinder. In June 1940 production drawings arrived to North America and were arrested by the US Treasure Department, that's when Ford engineers were able to copy them and soon derive a clone simplified for industrial production at Ford's factories. The GAA powered several models and derivatives of the M4A3 Sherman medium tank.Īfter the start of World War II, UK was looking to manufacture complicated parts (notably the crankshafts) of the Rolls-Royce Merlin in the US, but negotiations with Packard stalled because the company insisted on making complete engines. The factory-rated net output was 500 hp (370 kW) at 2,600 rpm. It displaces 1,100 cu in (18 L) and puts out well over 1,000 pound-feet (1,400 N⋅m) of torque from idle to 2,200 rpm. It features twin Stromberg NA-Y5-G carburetors, dual magnetos and twin spark plugs making up a full dual ignition system, and crossflow induction. ![]() The Ford GAA engine is an American all-aluminum 32- valve DOHC 60-degree liquid-cooled V8 internal combustion engine with a flat-plane crank designed and produced by the Ford Motor Company before and during World War II. Naturally aspirated with Stromberg NA-Y5-G carburetors Reciprocating internal combustion engine Ford GAA ![]()
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