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Diameter: 12 in - 18 in
... force to open the blades as do many other folding propeller types. Tests have shown that the efficiency of the 2-blade Gori Propeller in forward is better than most 2- and 3- blade feathering and folding ...
Gori Propeller
Diameter: 12 in - 20 in
... The VARIPROP GP 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 well as very low ...
SPW
Diameter: 12 in - 28 in
... The VARIPROP GP 3-blade is the original standard propeller for sailing vessels with an output of 6 – 550 kW. It delivers very smooth running, equally good stability especially at sea under power, and very low drag. Just like the VARIPROP ...
SPW
Diameter: 12 in - 28 in
... you need it most in the trough. The solution is the VARIPROP 4-Blade — to-date worlds most modern 4-blade feathering propeller, with 30% larger blade areas, less blade loading, much greater thrust and undiminished power. A smaller ...
SPW
Diameter: 23, 26, 27 in
... larger engines and more horsepower, but it also retains the benefits of Flexofold folding propellers, such as low drag, higher speed, and better safety.The folding propeller for SD15 ...
Flexofold ApS
Diameter: 16 in - 17 in
Pitch: 10 in - 15 in
... Racing Folding Propeller! Optimized for competitive and performance-driven sailors, this proven design is back - exclusively available in a 16’’ left-hand version with pitches from 10 to 15 inches. With 20% less drag ...
Flexofold ApS
Diameter: 15 in - 18 in
Pitch: 9 in - 16 in
... Composite boat propellers - the new generation of folding propellers Taking advantage of modern composite materials, the Flexofold Composite boat propeller hub is not only immune to ...
Flexofold ApS
Diameter: 368 mm - 495 mm
Pitch: 18 mm - 24 mm
... A simple and innovative solution of triple or four-blade propeller with gearless feathering. Under sail, the composite blades of the Kiwiprops orient themselves independently and freely like weather vanes in the water nets thus offering ...
Diameter: 394 mm - 521 mm
Pitch: 18 mm - 24 mm
... A simple and innovative solution of triple or four-blade propeller with gearless feathering. Under sail, the composite blades of the Kiwiprops orient themselves independently and freely like weather vanes in the water nets thus offering ...
Diameter: 14 in - 18 in
Pitch: 6 in - 25 in
... Our propeller model RAPIDO is leading the innovation race in its field thanks to the special gearless patented mechanism. The strong pre-loaded spring inside the body offers unique characteristics and takes the feathering propeller ...
EWOL Sailboat Propellers
... and with the latest generation “SWORD blades” that are efficient and silent. E3 Andromeda is a cutting-edge feathering propeller made by EWOL using high-resistance stainless steels. Like her larger sisters E3 ORION and E4 PEGASUS, its ...
EWOL Sailboat Propellers
... under difficult environmental conditions such as strong winds, limited spaces, rough seas, etc. EWOL Orion propeller, available for both the shaft line and the anti-shock device for Sail-Drive called FlexDrive, was designed ...
EWOL Sailboat Propellers
Diameter: 330 mm - 508 mm
Pitch: 178 mm - 381 mm
... 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 90% compared to the ...
Diameter: 330 mm - 430 mm
... Propellers Diameters 330mm to 430mm or 13″ to 17″ Shaft Diameters 22mm to 30mm or 7/8″ to 1.25″ Power For engine up to 40hp ...
Bruntons Propellers
Diameter: 12 in - 24 in
... EXPERIENCE... Manufactured here at Darglow, the FeatherStream yacht propeller is a simple solution to many problems that can be caused by fixed propellers. When sailing, the propeller automatically feathers ...
Diameter: 44 mm - 152 mm
... EASYDRIVE Foldable Propeller: The Ultimate 3-Blade Propeller for Maximum Performance The 3-blade propeller was specifically designed for riders who push the limits of rider weight, board ...
bw electronics GmbH
... nozzle profile A ducted propeller gives up to 30% higher thrust at low speed compared to an open propeller. Brunvoll HE nozzle profile is recommended for ships with high bollard pull requirements and low propeller ...
Diameter: 43 mm
Pitch: 11 mm
... Lightest fully foldable composite propeller designed and manufactured with engineering plastics free from hydrolysis, corrosion and cavitation for sailboats since 1994 ...
Ultimoo Composite Propeller
... Unique profile for a minimum drag in closed position. Geared blades for simultaneous closure. We do not manufacture folding propellers for saildrives. ...
... 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 gear hub prevent ...
Seahawk
... 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
... 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 operates forward ...
... 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 propeller ...
Martec
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.
ApplicationsThese propellers are found primarily on sailboats, but can be useful on the emergency back-up motors of powerboats.
TechnologiesSuch 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 chooseChoice 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.
- Increased speed under sail
- Slower maneuvering response
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