Chrysler a57 multibank




Chrysler a57 multibank

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  • When the United States entered World War II, there was a desperate need for a medium tank engine. Chrysler A57 engine as displayed at the Walter P. Chrysler Museum. The 5, lb (2, kg) Chrysler A57 engine package being installed in a M4A4 Sherman tank.

    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.

    [was at "SWANGROUP.INFO~Berliner-Ultrasonics/SWANGROUP.INFO"] JEEP. WWII Chrysler A57 Multibank Tank Engine Page. {this page} new (08 Oct ).

    Chrysler a57 multibank

    Chrysler a57 multibank

    It's a fairly classic roadster hot-rod, but about twice as big as most with a huge long wheelbase. A Chrysler engineer by the name of Burt Dickenson eventually resolved the fuel flow problems with this engine. Strange no comments on this fascinating part of Chrysler history. I would have hated to be the guy in the motorpool that had to sync the firing order and the carbs, especially the lower engines! If you are the Chrysler Corporation, you develop a design that uses five of your six cylinder car engines, arranged around a common crankcase.

    Chrysler a57 multibank

    Chrysler a57 multibank

    Chrysler a57 multibank

    Chrysler a57 multibank

    Chrysler a57 multibank

    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. 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.

    Chrysler a57 multibank

    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. 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.

    Chrysler a57 multibank

    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. 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.

    Chrysler a57 multibank

    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. On 3 June , nine months after the initial engine discussion, the first of M3A4 tanks were built with the A57 engine. From April to September , 9, Chrysler Multibank engines were built; 7, engines were installed in production tanks, and the remainder were built as spare engines.

    Multibank in action! Sherman Firefly Bastogne 2014



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