Tom blok Photo collection by Th.Schiöler Man powered The swing canoe or the dhoon Photo 17
The swing canoe or the dhoon
Gul streg
Photo 511 x 506 pixels, 43,6 K
 
The dhoon in Bangladesh
The existing law for all water-lifting devices says that output is not equal to all the power input . More than 50% is lost with some of the devices. This is not the case for the dhoon. Perhaps ten or twenty per cent is lost.
Taking a look at photo 20 we can understand how the "canoe" is pressed into the water and then lifted by means of the counterweight.
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