A multi-blade windmill engine that powered water pumps across the American Great Plains.
Samuel Harrow's 1883 wind engine patent featured a self-governing tail vane that automatically furled the blades in high winds, preventing mechanical failure. His design pumped water from deep wells across the frontier, making settlement of the arid plains possible.
Cast iron hub, galvanised steel blades, self-governing vane, babbitt-metal bearings, wooden tower frame.