33,000 . Thg,- modern method of finding the-brakejhorse-power, however, is to 'use a machine known as a dynamometer in which the energy developed by the engine is absorbed, by means of a water/ brake. In this a watertight casing carrying a weight arm is hung.on bearings. .Within the casing is a number of fixed cup's or vanes, adjustable for angle, and rotating between them and in close proximity to. them, the cup rotor driven by the engine. As the casing is full of water the-rotation of the rotor by the engine tends to. : turn the whole ' casing , ,'.and . ; . this tendency is resisted byythe" weight arm of%he'* : outer casing. At a certain fixed- 'speed the whole system can be brought dntp equilibrium by ibhe'adjuetmentj of ..suitable weights from the weight .arm. From this a simple calculation can, ;he- made' to determine the. i.h.p'. There are also fan brake dynamometers and| electrical testing • equipment in use nowadays.
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Bibliographic details
Auckland Star, Volume LXVII, Issue 117, 19 May 1936, Page 16
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154Untitled Auckland Star, Volume LXVII, Issue 117, 19 May 1936, Page 16
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