Chrysler tank arsenal. Workers in the huge tank Chrysler arsenal near Detroit, putting the tracks on one of the giant M-3 tanks. These rolling arsenals weigh twenty-eight tons, are capable of speeds over twenty-five miles an hour and are equipped with 75 mm. field artillery gun and a 37 mm. anti-aircraft gun, as well as four mounted machine guns and various unmounted arms its crew may carry. The tanks are powered by 400 horsepower Wright Whirlwind aviation engines