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... everybody knows about the function of the folding blades propeller for sailing hulls is: TO REDUCING THE PROPELLER DRAG DURING SAILING (propeller drag is reduced about ...
... Unique profile for a minimum drag in closed position. Geared blades for simultaneous closure. We do not manufacture folding propellers for saildrives.
... is the smallest of EWOL propellers, which however offers the same features and advantages of the original E3 ORION even for smaller boats, roughly between 18 and 30 feet. E3 ANDROMEDA is a cutting-edge feathering ...
In brief: The EWOL Hi-Speed propeller for sailboat is available with Sail Drive transmission or shaft line, 3 blades. It is built in stainless steel with high mechanical and corrosion resistance. It has micrometric ...
... , great maneuverability of the boat, but at the same time delicate and safe reversals for the inverter. Like all EWOL propellers, E4 PEGASUS maintains exceptional characteristics thanks to the quality of the materials ...
2 bladed folding propellers, reduce drag while sail-sailing, and gives a good advantage in race. Ra = 0,2
The only propeller designed and manufactured entirely on engineering plastics. Its innovative design incorporates the theory of "aspect ratio" for the development of the blades, adding more effectiveness to the performance ...
Designed for engines from 5 up to 40 hp. Available in multiple sizes and pitches for both S-drives and shafts. Made of extremely strong and durable nibral (nickel-bronze-aluminum) alloy. • Powerful thrust even in reverse thanks to our ...
Volvo Penta
... feathering and folding propellers. FULL POWER REVERSE Tests have shown that the efficiency of the 2-blade Gori propeller in reverse is equal to or better than most 2- or 3-bladed ...
Gori Propeller
... dimension to controllable pitch propellers: full feathering of the blades without any additional moving parts. Now you can make sizeable fuel savings without compromising on the reliability and robustness of the propeller ...
The list of Autoprop advantages, and the reasons to fit one, is now so long that the propeller has its own website. Auto pitching, auto feathering, the same thrust in astern as ahead, less prop-walk in astern, a brand ...
Bruntons Propellers
... standard CP-propeller systems. On a feathering propeller the blade angle can be arranged in line with the water flow. This reduces the water resistance and gives the following advantages; power ...
Name: K3 Horsepower Range: 37~ 15 to ~ 60 hp Diameter Range: 14.50" to 19.50" Rotation: Left or Right Hand Mounting: Shaft or Sail Drive Materials: SS316 and Composite Pitch Ahead: 18 - 24 degrees Pitch Astern: 24 degrees ...
Kiwiprops
New blade design is up to 20% more efficient than previous bronze models Use of Duplex 2507 for the blades allows a very thin cross section, while retaining great strength Body components cast in 316L O-ring seals on the blades and main ...
Seahawk
... Less drag than 2 or 3 blade fixed propellers Saildrive models feature ‘fail-safe’ cushion hubs All stainless steel construction Full installation kit with each propeller Propeller ...
Austral Propeller
... Mark III is the third generation of Martec folding props. And it%u2019s the lowest drag sailboat propeller anywhere. Thirty years of continuous development and improvement has resulted in a folding ...
Martec
... efficient power. The EASY ships fully assembled, making installation similar to a fixed propeller, basically slide it onto the shaft, nut it in place and the propeller is ready to go.
RP Magne
The VARIPROP 2-blade (DF 80 and DF 107) is the standard propeller for smaller sailing yachts with an output of 6 – 40 kW. The 2-blade is ideal for such sailing yachts since it has very high efficiency under power, as ...
SPW
... experience in feathering propeller design and in 2006 took the brave decision to design and manufacture a fully feathering propeller in the UK when many companies were moving production to China or India. ...
Darglow Engineering Ltd.
How to choose this product
A folding propeller is a mechanical device mounted at the aft end of a vessel's propeller shaft. The rotation of its twisted blades creates hydrodynamic thrust, propelling the craft forward. The blades are feathered when the motor is off, reducing drag and making for a substantial increase in speed.
Applications
These propellers are found primarily on sailboats, but can be useful on the emergency back-up motors of powerboats.
Technologies
Such propellers are generally made of copper-nickel, bronze, stainless steel or other alloys. Two or three articulated blades are mounted on a streamlined hub with circular rack and pinion gear. When the propeller or sail-drive shaft stops turning, water flowing over the blades folds them together, limiting drag. Velocity gain can reach one or two knots, not insignificant during a race.
How to choose
Choice will depend on the nature and diameter of the transmission, be it propeller or sail-drive. Other factors include engine make, model and power, and the reduction ratio of the reversing gearbox.
Advantages
- Increased speed under sail
Disadvantages
- Slower maneuvering response
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