Tom blok
Dragon-bone chains
Gul streg
Photo 511 x 506 pixels, 43,6 K
 
Another wind-powered dragon's backbone device
A propeller is the power source for this dragon's backbone pump. On the top of the telephone post there is the propeller together with a chain drive.
From here a chain transmits the power to a big chain drive below. Seawater is lifted about 20 centimetres.
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