Holt gas–electric tank

The tank was based on a lengthened and modified version of the suspension of the Holt Model 75, with pivoting track frames. There were ten road wheels at each side. The tank was tall, long, and wide. The vehicle had a Holt , 4-cylinder engine fitted with a General Electric generator driving an electric motor for each track; a comparable petro-electric system had earlier been used for the French Saint-Chamond that also was fitted with a lengthened Holt suspension. To prevent overheating the transmission—a constant problem with electrical types—a complicated water-cooling system had been installed.. ==Armament ==

Like the French tank, the Holt gas–electric had a British designed 75 mm mountain gun placed low in the V-shaped nose; two removable 7.62mm Browning machine guns in sponsons one each side. The engine and transmission were in the rear, next to a corridor leading to the only door. Only one was built as tests showed its climbing performance was unsatisfactory, and it was much heavier than planned at about . ==Evaluation==

The Holt proved to be a disappointing design, crawling along at a top speed of 6 mph and a range of only 31 miles. The cooling system added to the already too-heavy weight of the tank, which meant that it really struggled to climb even mild slopes. The project was abandoned after the one prototype had been completed and underwent trials. ==References==