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Diameter: 13, 15, 16 in
Pitch: 7, 8, 9, 10, 12 in
Our 2-blade folding propeller is made of extremely strong and durable nibral (nickel-bronze-aluminum) alloy. It's designed for engines from 5hp to 40hp and is available in multiple sizes and pitches for ...
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
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
Diameter: 1,450 mm - 1,950 mm
Pitch: 18 mm - 24 mm
Diameter: 1,550 mm - 2,050 mm
Pitch: 18 mm - 24 mm
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
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
Diameter: 41 mm
Pitch: 10 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
Lightest fully foldable composite propeller designed and manufactured with engineering plastics free from hydrolysis, corrosion and cavitation for sailboats since 1994
Ultimoo Composite Propeller
... 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 ...
EWOL Sailboat Propellers
E3 Orion is a cutting-edge feathering propeller made by EWOL using high-resistance stainless steels Its core is made up of gears that allow the blades to navigate according to the fluid threads of the water while sailing ...
EWOL Sailboat Propellers
... , 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 ...
EWOL Sailboat Propellers
Diameter: 15 in - 18 in
... NEW Flexofold Composite propeller has been tested for many seasons by appointed test sailors and has already been chosen as the original propeller by multiple boatyards, including Elan Yachts and Saffier ...
Flexofold ApS
... Unique profile for a minimum drag in closed position. Geared blades for simultaneous closure. We do not manufacture folding propellers for saildrives.
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% ...
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
... 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. ...
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
... 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 ...
... 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.
... 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 ...
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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