Model of a Wind-Driven Pump

Model of a pump driven by windmill sails, in frames with two storeys, almost identical to NG-MC-648-1. The lower storey is a basin containing the pump pipe, which has a discharge pipe at the upper storey. The pump paddles are simple metal valves, as are the pump plungers connected to a crank via a pump rod; in one model, the top of the pump pipe is closed with a wooden plug, ensuring the vertical movement of the pump rod. The crankshaft is driven by four windmill sails; the crankshaft and sails are mounted on a wooden cylinder with a metal ring, allowing the whole assembly to be rotated into the wind direction.