Hydraulic engineering; a practical treatise on the principles of water pressure and flow and their application to the development of water power, including the calculation, design and construction of water wheels, turbines, and other details of hydraulic power plants (1909)
American School (Chicago, Ill.), Black, Adolph, Turneaure, Frederick Eugene, 1866- · Chicago American School of Correspondence · leaf 155
inserted a concentric tapered needle. A change of position of this needleproduces a corre-sponding changeof discharge areaof the nozzle;the amount ofwater used isthus varied, andthe power of thewheel influencedproportionally. The needle regu-lating and deflect-ing nozzle (Figs.51 and 52) is a most… … Fig. 50. Stream of Water from Pelton Needle Nozzle Operat-ing under 390-Foot Head and Developing 1.500 H.P. Note the shadow of needle showing through stream, and theperfect form of jet.
