Why choosing an EWOL Propeller

EWOL sailboat propellers are made of high strenght stainless steel alloys that represent the most advanced technology in terms of resistance to galvanic corrosion, the feathering props we manufacture are the expression of the most sophisticated technical solutions on the market.
 
The EWOL prop can be installed on sailing boats with both traditional (endothermic) and electric engines and with both mechanical and hydraulic inverters. So that the propeller is positioned in feathering position it is necessary that the propeller shaft be blocked for at least a second. With hydraulic inverters for feathering positioning it will therefore be necessary to start the engine with a small reverse stroke of half a second (while sailing at at least 3 knots) and then switch off the engine. If this procedure does not work, the shaft will have to be stopped in another manner, for example by hand or with a shaft brake.
 
Materials
The components of the E3 are made of stainless steel alloys type superduplex, these materials had been developed specifically in order to perform in the most difficult conditions at deep waters on off-shore oil platforms.
These advanced metallurgy alloys are quite expensive but offer definitely superior performance in terms of corrosion resistance and shock resistance compared to the bronze alloys normally used in the manufacturing of marine propellers.

 

Other technical solutions equipping EWOL Props

 
Interchangeable bushings
EWOL propellers are equipped with interchangeable bushings; this solution allows to easily perform the maintenance of the propeller, which is necessary after a few years of operation, in order to restore the initial tolerances without the need for complex recovery jobs or replacement of mechanical parts.
 
Helical gears
The bevel-helical gears of blades, in addition to ensuring a greater mechanical resistance than the straight gears, provide better positioning accuracy and smoothness of rotation. This feature ensures an immediate and precise positioning of the blades during the various positioning, drastically reducing the shock on the teeth.
 
Fine pitch setting
EWOL E3 is the only propeller on the market having an ultra-fine pitch adjustment device: the sensitivity adjustment is in fact of ¼ degree, in a range of blades angles going from 14 to 26 degrees. Other propellers on the market have a minimum sensitivity of 2 ° or 2.5 °, which makes them inaccurate in determining the pitch of the propeller and therefore impacting engine's performance. Fine pitch setting is very important in order to reach the correct operating conditions of the engine which must permit to obtain the best compromise between the installed power and the hydrodynamic characteristics of the boat, thus ensuring a better efficiency and lower fuel consumption.
 
Asymmetric pitch
The pitch adjustment acts solely on the forward avoiding to affect the pitch of the reverse gear which must instead ensure excellent maneuverability and responsiveness of the boat at low number of revolutions.

 

  

          

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