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December 6, 2018
More Economical Propellor Design
HISWA MAGAZINE: Dec 6th 2018 | Onlinetouch.nl | READ ONLINE
More economical propellor design (Translated from Dutch)
Three, four, five or more curved strips of metal form the blades of the Sharrow Propeller. This is a new ship’s propeller with which the American engineering firm Sharrow Engineering claims that yachts can save 9 to 15 percent fuel. The specialists in hydrodynamics calculated with computer simulations that the ratio between the power delivered by the engine in the water with their new propeller is one tenth to one seventh better than with conventional ship propellers. In addition, the developers promise less vibration, greatly reduced cavitation, a higher top speed and a stronger propellor with longer life. The design has been approved by the shipping authority IMO and patents have been granted in the main seafaring countries. The Sharrow Propeller has been extensively tested in both test basins and in open water and the results under a boat look just as promising as in the calculations.