Chrysler tank engine




Chrysler tank engine

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  • By William Pearce. When the United States entered World War II, there was a desperate need for a medium tank engine. Chrysler responded.

    Here's one of the most unusual powerplants ever produced in the Motor City: the cylinder Chrysler A57 tank engine of World War II.

    The deal with the A57 was that Chrysler needed to whomp up a tank engine in a hurry, so as to put the kibosh on the Thousand Year Reich and.

    Chrysler tank engine

    Chrysler tank engine

    Actually, it appears to just be a central "shaft", not a crankshaft. The first production engines had a single-barrel carburetor mounted directly on the intake manifold for each of the five engine sections. Despite some shortcomings, the Sherman M4 tank was a valuable tool for the Allies in World War II, and it was produced in vast numbers—nearly 50, units. The Multibank A57 engine had a large cast iron crankcase that formed the central structure of the powerplant. The fifth engine was bolted vertically at the top of the crankcase.

    Chrysler tank engine

    Chrysler tank engine

    Chrysler tank engine

    Chrysler tank engine

    Chrysler tank engine

    S. Berliner, III's SWANGROUP.INFO Chrysler Multibank Engine Page

    Chrysler responded with a very unusual idea. Chrysler had its cu in 4. Under the direction of Executive Engineer Harry Woolson, the Engine Design department, headed by Mel Carpentier, designed a new powerplant that utilized the cu in 4. The basic idea was to combine five of these six-cylinder engines into a five-bank, cylinder, single engine for medium tanks.

    This new engine, referred to as the Multibank, was given the designation A Chrysler A57 engine as displayed at the Walter P.

    Chrysler tank engine

    Note the central water pump feeding the five engine banks, the individual distributors for each engine bank, and the row of carburetors at top: The Multibank A57 engine had a large cast iron crankcase that formed the central structure of the powerplant. Five Chrysler cu in 4. Two addition engines were bolted to the crankcase above the first two, with their cylinders 27 degrees above horizontal.

    The fifth engine was bolted vertically at the top of the crankcase. The five six-cylinder engines made up the banks of the A The A57 engine was mounted in the rear of the tank, and the crankshaft output flanges faced the front of the tank.

    Chrysler tank engine

    The A57 retained the five crankshafts of the five six-cylinder engines. A drive gear was coupled to the crankshaft of each engine bank. These five drive gears meshed with a single, central gear all gears had herringbone teeth. The central gear drove the output shaft of the power plant. The output shaft went through the radiator and drove the cooling fan and clutch, which was attached to a drive shaft and then transmission. The A57 was originally equipped with five belt-driven water pumps.

    However, the belts would often break because of the alternating loads on the crankshaft pulleys. The design was changed to a single water pump with five outlets one for each engine bank. This single water pump was driven by an accessory shaft from the central drive gear located on the opposite end of the central crankcase. Also at the rear of the tank, each engine bank had its own ignition coil and distributor that was gear-driven from the camshaft.

    The first production engines had a single-barrel carburetor mounted directly on the intake manifold for each of the five engine sections. The different pipe lengths and contours leading from the air cleaner to the carburetors resulted in unequal fuel distribution.

    Chrysler tank engine

    Metal vanes were added to direct airflow, and ultimately the five carburetors each connected to its respective engine with a downpipe were relocated in the same plane above the engine. This change simplified throttle linkages, the air cleaner arrangement, and maintenance. The A57 Multibank had two oil pumps located in the central crankcase.

    One oil pump was a scavenge pump to transfer oil to a remote reservoir. The second pump was pressure pump that took oil from the reservoir and delivered high-pressure oil to all five engine sections. The A57 engine had a 3. The engine produced hp kW and 1, lb ft 1, N m of torque at 2, rpm. Given the arrangement of the engine sections, the Multibank was a relatively short but heavy engine, weighing 5, lb 2, kg including radiator, cooling fan and clutch. Construction of the A57 utilized existing tooling from the cu in 4.

    M4A4 Sherman Multi-bank



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