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Bucket elevators, Persian wheels and Norias

1 byte removed, 02:27, 24 September 2013

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[[Image:bucket elev icon.png|right|~~100px~~80px]]

[[Image:persianWheel.jpg|thumb|right|~~250px~~200px|Persian wheel. Drawing: FAO]]

[[Image:noria.jpg|thumb|right|~~250px~~200px|Noria. Drawing: FAO]]

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An improvement to the simple rope and bucket is to fit numerous small buckets around the periphery of an endless belt to form a continuous bucket elevator. The original version of this, which is ancient in origin but still widely used, was known as a "Persian wheel"; the earliest forms consisted of earthenware pots roped in a chain which is hung over a drive wheel. The water powered "noria", a water wheel with pots, buckets or hollow bamboo containers set around its rim, is similar in principle except the containers are physically attached to the drive wheel circumference rather than to an endless belt suspended from it.

====Assembling a water wheel====

[[Image: water wheel 1.jpg|thumb|right|~~250px~~200px|Assembling and fitting the 4 metre diameter waterwheel at Mazowe. Photo: Peter Morgan.]]

* Parts of the wheel were first made up in the Blair Laboratories. They were then taken to the irrigation canal at Mazowe and assembled. The wheel was made up mostly of plywood and pine beams. The axle was made from 75mm steel pipe, reduced through reducing sockets to 50mm pipe. The axle was mounted through two sealed ball bearings mounted on the two brick built supports at the side of the canal.

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