Tank-mounted Flamethrowers
In World Wars I and II, as well as in the Vietnam war, flamethrower designs similar to the handheld models were mounted on tanks.
Typically, the fuel in these weapons was driven by rotary or piston pumps, powered directly by the tank engine. With greater pumping power, tank-mounted flamethrowers had better range, and with more fuel tank space, they had a larger ammunition supply.