Made in Germany

Perfect Propulsion


  • Modern folding propeller for serial yachts
  • Cambered bladedesign
  • Excellent thrust
  • 2-, 3- oder 4-Blatt version available
  • For engines from 20 to 750 HP

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.

This site will tell you more about the unique design features which find VARIFOLDs being fitted to Swans, Baltic Yachts, Wally's and Moody's to name but a few.

  • leran more about the the specific features of the VARIFOLD series »
  • Or get more information about the specific characteristics of the VARIFOLD types in detail »
  • Owners of serial yachts can use our Propellerfinder to determine wich propeller of the Varifamily are properly the best for their needs,

 

 

Impressive technology

VARIFOLD is the definition of outstanding quality of material and technology. Nickel aluminium bronze material guarantees durability and high corrosion resistance.  Alongside its opening and running features, VARIFOLD is impressive on the supposed weak points of a propeller. Take, for example, the hard-wearing rubber buffers in the saildrive hub, fixed in the special cut-outs – ensuring the propeller starts up gently yet the buffers cannot become detached. The saildrive hub is isolated to protect against electrolysis.

Simple assembly and a very high level of safety

VARIFOLD's unique opening technique will impress you. This folding propeller not only opens by means of centrifugal force, but also by means of the shaft torque, resulting in particularly smooth and reliable opening. VARIFOLD has a cambered design. This specially cambered blade profile delivers very high thrusts as well as quiet and smooth propeller running.

VARIFOLD is easy to mount and is supplied complete with the tools required. Solid bolts ensure the propeller blades are fixed securely. VARIFOLD VF 70 is an extremely safe propeller thanks to this special bolt locking. So you can be sure of not losing anything again.

Boats using the VARIFOLD


VARIFOLD-Design


VARIFOLDs are designed to solve problems which have affected folding propellers since they were first introduced.

Perfect!

PG Johansson of Baltic Yachts on the 4-Blade VARIFOLD fitted to a Baltic 147 (45 m, 75 to).

Working with SPW, and other companies in the Bruntons group, who design and manufacture propellers for vessels as diverse as nuclear submarines and luxury motor yachts, the designers have achieved their objectives.

The resulting range of propellers share design features which are little short of revolutionary. VARIFOLD marries virtually all the benefits of a fixed propeller when motoring, to those of a low drag folding propeller when sailing.

VARIFOLD's very low noise and vibration characteristics are achieved by state of the art blade design and proper helical pitch distribution, including pitch reduction towards the blade tip. This radically reduces cavitation and, in combination with the skewed blades, greatly reduces noisy pressure pulses against the hull.

No other manufacturer offers this full package on such a wide range of folding propellers. Putting the technicalities to one side it’s very simple - VARIFOLDs work!

 

Opening technique with a difference

VARIFOLD's unique opening technique will impress you. You see, this folding propeller not only opens by means of centrifugal force, but also by means of the shaft torque, resulting in particularly smooth and reliable opening.The VARIFOLD has a cambered design. This specially cambered blade profile delivers very high thrusts and quiet and smooth propeller running.

the VARIFOLD in action:

Varifold sailing

VARIFOLD, in all its versions – two, three and four blade, is an exceptional low drag racing propeller. Unlike some folding propellers, on most installations VARIFOLDs do not rotate when sailing, even at higher speeds.

Varifold astern

Varifolds open when you go astern! This is again a feature of the design which relies on hydrodynamics as well as inertia to assure reliability. Thrust is greater than other folders by virtue of the design.

Varifold ahead

Most folding propellers suffer from varying degrees of noise and vibration and the problem becomes worse the more power the propeller has to deliver. If your yacht has an engine from 20hp to 750hp, there is a VARIFOLD for you which will provide high thrust with smooth and quiet running.


The VARIFOLD models


The VARIFOLD 2-blade (VF 70)

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 305mm to 432mm 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 432mm to 813mm or 16” to 32”
  • For engines rated to 350HP
  • 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 920mm 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.

 

  • Diameters up to 1,016 mm or 40”
  • For engines rated to 750HP
  • 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

 


VARIFOLD technical data


Technical data Varifold 2-blade

Maesurements C and B

C inchC mmB inchB mm
123055,3135
133305,8148
143556,3160
153816,8173
164067,3185
174327,8198

Metric taper

D mmd mmTaperTPLThreadWA
20151:1050M 14 x 1,56105
2216,51:1055M 14 x 1,56110
25191:1060M 16 x 1,56115
30221:1080M 20 x 1,58135

Imperial taper

D inchd inchTaperTPL inchW inchA inch
7/80,711:1223/164,2
10,811:122 1/41/44,4
1 1/80,921:122 1/21/44,7
1 1/40,991:123 1/85/165,3

American Taper

D inchd inchTaperTPL inchThreadW inchA inch
7/80,711:162 5/85/8 UNC - 11G1/44,8
10,811:1633/4 UNC - 10G1/45,2
1 1/80,921:163 3/83/4 UNC - 10G1/43,5
1 1/41,021:163 3/47/8 UNC - 9G5/163,5

Technical data Varifold 3- und 4-blade

Measurements C and B

C inchC mmB inchB mm
164066,7170
174327180
184577,7195
194838205
205088,7220
215349230
225599,7245
2358510,2260
2461010,6270
2563511,6295

Metric taper

D mmd mmTaperTPLThreadWA
30221:1080M20 x 1,58150
35261:1090M24 x 210160
40301:10100M24 x 212170
45341:10110M30 x 214180

Imperial taper

D inchd inchTaperTPL inchW inchA inch
1,1250,921:122,51/45,2
1,250,991:123,135/165,8
1,381,11:123,255/165,9
1,51,211:123,53/86,1
1,631,311:123,753/86,4
1,751,391:124,387/167

American Taper

D inchd inchTaperTPL inchThreadW inchA inch
1,1250,921:163,3753/4" UNC1/46
1,250,991:163,757/8" UNC5/166,4
1,381,121:164,1251" UNC5/166,8
1,51,221:164,51 1/8" UNC3/87,1
1,751,421:165,251 1/4" UNC7/167,8

VARIFOLD References


  • Albacore
  • Alden 55
  • Alliaura 745
  • Alloy Sailing Catamaran
  • Baltic
  • Beneteau
  • Berret Racoupeau
  • Blubay
  • Briand 75' "Fifty Fifty"
  • Bruckman 50
  • Catana
  • Chuck Paine
  • CNB
  • Colin Archer Type
  • Contest 50
  • Cori 86
  • Discovery 55
  • Dixon
  • Dragonfly 1200
  • Dutch Sailing Yacht
  • Dynamique 80
  • Expedition 56
  • Farr
  • Formosa
  • Franchini
  • Frers Custom Yacht
  • Friendship
  • Garcia
  • German Frers
  • Grand Soleil
  • Gunboat
  • Hallberg Rassy
  • Hinkley
  • Hoek
  • Hylas
  • Irwin
  • Jaquelina
  • Jeanneau Sun Odyssey 54DS
  • JJ80
  • Judel & Frolijc
  • Kanter 63
  • Karatas
  • Langan
  • Lemster Aak
  • Leopard
  • Little Harbour
  • Maim
  • Moody
  • Morven
  • Najad
  • Nauticat
  • One off
  • Oyster
  • Perini Navi
  • Safari
  • Scottish
  • Shannon Shoal Sailor
  • Shipman
  • Shoalsailer
  • Silhouette
  • Solaris
  • St Francis
  • Sunreef
  • Swan
  • Tayana
  • Tognum
  • Vallicelli
  • Van de Stadt
  • Wally
  • Yapluka