File:Watermill at Rheinfall 3.JPG
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English: Undershot waterwheel at Rheinfalls, Switzerland.
A vertically-mounted water wheel that is rotated by water striking paddles or blades at the bottom of the wheel is said to be undershot. This is generally the least efficient type of wheel. It has the advantage of being cheaper and simpler to build, but is less powerful and can only be used where the flow rate is sufficient to provide torque.
Nederlands: Onderslaand waterrad bij Rheinfall, Zwitserland.
Bij onderslaande waterraderen stroomt het water onder het rad door een groef heen. De groef is een leiding die aan het rad aangepast is. Ze verhindert dat water onder en zijdelings langs de schoepen stroomt, zonder deze aan te drijven. De krachtoverbrenging gebeurt over schoepen, men spreekt daarom over schoepenraden. In hun eenvoudigste vorm bestaan de schoepen uit een houten plan, betere rendementen worden echter met speciaal gebogen plaatijzeren schoepen behaalde. Het rad wordt voor een belangrijk deel door de kinetische energie van het eronder stromende water aangedreven, maar ook bij onderslaande raderen is het verval en daarmee de zwaartekrachtenergie bepalend is voor de werkprestatie.
Deutsch: Unterschlächtiges Wasserrad bei Rheinfall, Schweiz.
Bei unterschlächtigen Wasserrädern fließt das Wasser unter dem Rad in einem Kropf durch. Der Kropf ist eine Führung, welche dem Rad angepasst ist. Sie verhindert, dass Wasser unterhalb und seitlich der Schaufeln abfließt, ohne es anzutreiben. Die Kraftübertragung geschieht über Schaufeln. In ihrer einfachsten Form bestehen die Schaufeln aus einem Holzbrett, bessere Wirkungsgrade werden jedoch mit speziell gebogenen Blechschaufeln erzielt.Français : Roue en dessous à Rheinfall, Suisse. |
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| Author | Ad Meskens | |||
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| current | 19:07, 17 April 2009 | | 2,736 × 3,648 (7.26 MB) | Ad Meskens (talk | contribs) | {{Information |Description={{en|1=a}} |Source=Own work by uploader |Author=Ad Meskens |Date= |Permission= |other_versions= }} <!--{{ImageUpload|full}}--> Category:Watermills |
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