Early US Armor by Steven J. Zaloga

Author:Steven J. Zaloga
Language: eng
Format: epub
ISBN: 9781472818096
Publisher: Bloomsbury Publishing
Published: 2016-01-08T00:00:00+00:00

The last attempt to redeem the Christie suspension was the T7 project in 1938. This mounted a new suspension with pneumatic tires to a M1A1 Combat Car. It was rejected by the Cavalry because by this stage the durability of the basic M1A1 precluded the need for such expensive approaches.

The American LaFrance T3E2 bore a family resemblance to the Christie design except that the hull had been widened to accept a four-man crew. In many ways, this paralleled the Soviet experience with the BT series that had evolved into the A-20, later leading to the T-34 tank of World War II. The Liberty engine used on the Christie tanks was replaced by a 435hp Curtiss D-12 aircraft engine that provided a maximum speed of 58mph on wheels and 35mph on track. New forged link tracks with a shorter pitch were used that reduced the tendency of the tank to shed its track compared to the archaic plate tracks of the Christie tank. The T3E2 suffered the same inherent problem of the Christie design, mating too powerful an engine with too delicate a transmission and final drive. Clutch-and-brake steering was inadequate for such a powerful powertrain. All five tanks had improvements and were designated as the T3E3 afterwards.

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