Probably the finest feathering propeller in the world

Quality features:

  • Robust, long lasting gearing
  • SOFTSTOP™ shock absorber
  • Shortest Hub — perfekt for smaller prop apertures
  • Available as 2-, 3- or 4-Blade Version
  • For engines from 12 to 750 HP
  • All VARIPROPs are made out of high-strength NIBRAL-bronze (ice-class) for extra long life
  • MRI-tested for highest quality

Short overview:

The idea was to develop a superior feathering propeller that was user-friendly. That was more than 30 years ago and we are pleased to say we have achieved all our design ambitions and more. Through continuous innovation and rigorous testing SPW has designed and developed the VARIPROP to be the most modern feathering propeller found anywhere in the world.

Which VARIPROP is the right for your engine:

for small yachts with engines from 6 to 40 hp

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for all sailing vessels with engines from 6 to 100 hp

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For open sea vessels with engines above 100 hp

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For tall ships and Superyachts any engine power

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A look at our VARIPROP feathering propeller. It reduces drag under sail but still produces full power when motoring. Since it is a 4 bladed prop it produces the most thrust in the aperture we have between the skeg and the hull of our Southerly 42.

Watch the Distant Shores VARIPROP "Blue Water (4-Blatt) Review on Youtube

SV ORIZON - Sailing in the Mediterranean… In this episode, Andis and Silvis boat is still ashore in the dry marina "Port Navy Service" and the SPW VARIPROP Feathering Propeller is assembled.

Youtube Link

 

VARIPROP features

Factory-ready delivery

We supply the VARIPROP feathering propeller at the factory

  •      assembled
  •      ready-to-install & greased
  •      balanced
  •      pitch is set

When the engine is turned off, the waterflow rotates the blades automatically into the feathered position.

Benefits: Drag is almost eliminated and speed increases 15% to 20%, depending on wind conditions. Propeller turbulence vanishes and a substantially enhanced rudder effect is achieved.

When shifting into reverse, less than one shaft rotation turns the leading edge of the blades 180 degrees.

Benefits: Efficiency (thrust) in reverse is equal to forward, 30% - 40% more than all fixed propellers. You get improved stopping power, which also decreases “Prop Walk” (paddle wheel effect). In case of varying step-down gears (i.e. Yanmar Shafts) the pitches in foward and reverse are optimal set by factory.

Independently adjustable external pitch control

Forward and reverse pitches can be changed in just seconds — even underwater

Benefits: Custom fine tuning (in micrometer-small increments) of reverse thrust vs. prop-walk. (For most owners, eliminating prop walk is more important than maximizing reverse thrust.)

VARIPROP allows you to customize that balance for optimum control, maneuverability and safety. Independent fine tuning of forward thrust means that VARIPROP delivers the best possible performance (speed, thrust, fuel economy) in forward without compromising reverse performance – and vice versa.

SoftStop™ shock absorber

Shock Absorbing Multidisc Brake (patented) built into the VARIPROP hub.

Benefits: Dramatically reduces shock loads on gearbox and drivetrain, permits shifting at higher speeds without damage, preserves preset pitches by eliminating hard limit stop impacts (the typical “clunks” of all others). The entire drive train benefits: longer cutless bearing life, minimized wear on gearbox, clutch plate, bearings.

Shortest hub

VARIPROP’s hub is flush with the forward edges of the blades, and barely protrudes past the aft edges.

Benefits: VARIPROP will fit into the smaller prop apertures of older traditional “full keel“ yachts – not possible with most competing propellers. Rope cutters (SPW, SPURS™ or solid types) can be mounted very close to the VARIPROP blades, the ideal position. This is a huge advantage for boats operating in areas with fields of lobster pots, crab pots and fish traps. With competing props, because of their much longer hubs, all such cutters must be mounted farther away from the prop blades, which drastically reduces their effectiveness.

Precision engineering

Superb German precision engineering in a custom made prop vs. mass-produced competitors.

Benefits: Every VARIPROP is built to order-consistently 100% up to stringent specs for reliable, smooth and efficient operation. Quality is assured by compliance with DIN ISO 484 international manufacturing standards and approved according to the standards of the “Germanischer Lloyd”.

Balanced by machine

Each propeller is dynamically balanced by machine — the result: hightest quality.

Benefits: Smoother, quieter running with absolutely zero vibration

MRI tested

As a final step all propellers are tested by an Hale MRI (Measurement Recording Instrument), one of the most modern 3D Measurement Instruments.

Benefits: Thanks to the 3D propeller analysis you can be sure that each VARIPROP is maximum quality and precision proofed before shipment. Each customer receives an individual test certificate when the VARIPROP is delivered.

 

Comes fully assembled and tested

Benefits: VARIPROP mounts on your shaft just like a solid prop. No disassembly, no shaft modifications.

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