The models

The remarkable VARIFOLD propeller range has grown from a single two blade model to include three and four blade versions in a very short space of time. VARIFOLD is the propeller of choice for many highly respected yacht manufacturers and their customers. For years, owners of yachts equipped with folding propellers have suffered from a multitude of problems to which there seemed no solution.

High noise, vibration and cavitation levels, poor astern performance and unreliable blade opening degraded the enjoyment of ownership. With a three model range covering all sizes of yacht, owners can enjoy the benefits that VARIFOLD brings.

The VARIFOLD 2-blade

VARIFOLD is suitable for all types of boat, although the propeller size must be matched up to the size of the craft and the engine output. VARIFOLD is available in sizes 12"-17" – both for shaft assemblies and for the saildrive. We would of course be happy to advise you which size of propeller is suitable for your craft.

  • Diameter 305 mm to 432 mm or 12” to 17”
  • For engines rated to 50hp
  • Available for shafts & saildrives
  • Blades fold completely together for minimum drag
  • Modern blade design with substantial blade area for smooth running and minimum noise & vibration
  • Rubber bump stops minimise blade opening impact

The VARIFOLD 3-blade

The VARIFOLD 3-blade is a design breakthrough in propeller technology: a winning combination of good thrust, improved performance in reverse manoeuvres and smooth, quiet running when powered. Developed especially for cruising and racing yachts, its cambered design combined with skewed blade tips ensures that maximum thrust is delivered with minimum noise and vibration.

VARIFOLD's feathered position is also unique. The blades fold in with only the slightest of gaps, thereby minimising drag when sailing. The blades open out against rubber buffers fitted in the hub. These buffers cushion the blades when  the propeller opens into drive position. Each VARIFOLD is dynamically finely balanced, and, with its gleaming, matt finish, stands out as a top-quality propeller. Folding propeller in mother-of-pearl finish.

  • Diameter 406 mm to 813 mm or 16” to 32”
  • For engines rated to 350 HP
  • Available for shafts & saildrives
  • Latest blade design incorporates high skew and cambered blades for smooth operation
  • Pitch reduction at the tip to reduce pressure pulses on the hull

The VARIFOLD 4-blade

The VARIFOLD 4-blade propeller with a diameter of up to 920 mm is the latest SPW development. 4 strengths for on-board comfort which fulfil a modern skipper's every desire. Just as with the 2 and 3-blade series, the outstanding feature of the blades is their modern cambered design. This special blade shape not only lends the VARIFOLD exceptional visual appeal, but also unparalleled thrusts!

The propeller was designed and developed to the production stage in close collaboration between Bruntons Propellers and SPW GmbH, SPW having conceived the design and Bruntons taking on construction. The end-product is a 4-blade propeller that delivers greatly increased top speed under sail and much smoother running when powered. See a high-performance Baltic 147 (with Caterpillar 710 hp engine) with mounted 4-blade VARIFOLD.

  • Diameters up to 1016 mm or 40”
  • For engines rated to 750 HP
  • Designed for high power sailboats, to minimise noise & vibration
  • Incorporates the latest low noise blade design
  • High blade area minimises cavitation and thrust breakdown at full power giving improved efficiency and speed


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