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boat propeller / folding / shaft drive / saildrive
boat propeller
SDrive

racing sailboat propeller / folding / propeller shaft / 2-blade
racing sailboat propeller
Folding propeller

... Unique profile for a minimum drag in closed position. Geared blades for simultaneous closure. We do not manufacture folding propellers for saildrives.

sailboat propeller / folding / shaft drive / saildrive
sailboat propeller

... 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 ...

sailboat propeller / auto-feathering / saildrive / 3-blade
sailboat propeller
EWOL E3

E3 ORION is a cutting-edge flag propeller made by EWOL totally in high resistance stainless steels: its heart is made up of gears that allow the blades to orient themselves according to the fluid threads of the water ...

boat propeller / folding / saildrive / 2-blade
boat propeller

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 ...

sailboat propeller / folding / saildrive / 2-blade
sailboat propeller

... 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 ...

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Gori Propeller
boat propeller / folding / outboard and sterndrive / 2-blade
boat propeller

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 ...

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Volvo Penta
boat propeller / auto-feathering / variable-pitch / shaft drive
boat propeller
H20

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 ...

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Bruntons Propellers
ship propeller / auto-feathering / shaft drive / 4-blade
ship propeller

... 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 ...

boat propeller / auto-feathering / shaft drive / 2-blade
boat propeller

boat propeller / auto-feathering / saildrive / 3-blade
boat propeller
K3

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 ...

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Kiwiprops
boat propeller / auto-feathering / propeller shaft / 3-blade
boat propeller
S1

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 ...

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Seahawk
racing sailboat propeller / folding / propeller shaft / 2-blade
racing sailboat propeller
TYPE PP

2 bladed folding propellers, reduce drag while sail-sailing, and gives a good advantage in race. Ra = 0,2

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Hélices y Suministros Navales
racing sailboat propeller / folding / propeller shaft / 2-blade
racing sailboat propeller
Slipstream®

... 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 ...

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Austral Propeller
racing sailboat propeller / folding / propeller shaft / 2-blade
racing sailboat propeller
MARK III ELIPTEC

... 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 ...

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Martec
boat propeller / auto-feathering / saildrive / 3-blade
boat propeller
EASY

... 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.

boat propeller / auto-feathering / saildrive / 2-blade
boat propeller
SDC

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RP Magne
boat propeller / auto-feathering / shaft drive / 2-blade
boat propeller
VARIPROP

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 ...

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SPW
boat propeller / auto-feathering / saildrive / 3-blade
boat propeller

... 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. ...

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Darglow Engineering Ltd.

How to choose this product

folding-propeller

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