eXploder Course Racing windfoils (Open Foil / Formula Foil)

After three years of R&D, several prototypes, improvements and iterations, hours of computer simulation and on-water testing by the best windsurfers, eXploder introduces a windfoiling course racing set. We do not test our equipment on our customers, and before we put anything on the market, we make sure every detail has been tried and tested in competition by our team sailors. eXploder CR windfoils have already won several World, European and National Championship medals in Formula Foil Class. eXploder CR foils are also fully registered and legal to use in PWA competition.

Because speed is nothing without control, eXploder windfoils offer unparalleled levels of stability and control on upwind-downwind courses, allows a sailor to concentrate on all important aspects of racing like paying attention to wind shifts, gusts and other sailors, while easily maintaining maximum speed on all points of sailing.

Our brand new 2021 course racing (up-downwind) windfoil set comprises of following components, all fully demountable:

1. Ultra-stiff, 95 cm pre-preg Ultra High Modulus (UHM) carbon mast,

2. One carbon prepreg front wing – to choose from:

Large: 920 cm2 / 100 cm span – light / medium wind. Medium / heavy sailors

Medium: 860 cm2 / 90 cm span – strong wind / lightweight sailors

3. One aluminium alloy (6082), corrosion resistant, 116 cm long fuselage with super solid mast-fuselage interface (7 Torx screws) and a precise infinite angle adjustability of the rear wing.

A customer can choose from our 2 fuselage models, both measuring 116 cm*:

Regular (recommended for heavier riders in light winds) – mast front mounting position 46 cm form leading edge of the front wing.

High wind / lighter sailors (<70kg) – mast mounting position 41 cm form leading edge of the front wing.

* – in eXploder foils the rearmost position of the wings / fuselage set is the trailing edge of the rear wing, which protrudes up to 4 cm behind the fuselage (depending on rear wing angle setting). To be within maximum allowable equipment rule (120 cm), the fuselage itself needs to be 4 cm shorter.

4. One carbon prepreg course racing specific rear wing – (250 cm2; 50 cm span – not compatible with slalom fuselage).

Complete windfoil Course Racing set is provided with a set of eXploder covers, set of screws (except 2 tuttle box head screws) and an instruction manual.

For sailors, who would like to cover the whole range of wind / sea conditions we also offer a super set with two front wings and two fuselages (regular and high wind / light weight).

Super stiff, torsion resistant UHM carbon mast

It’s one thing to create a foil mast that is stiff sideways, the other – to create a mast that is torsionally stiff. This is torsional stiffness that makes the controllable foil, especially on reaches / downwind courses. Bottle-shaped outline, special inside structure and material use allowed us to create extremely stiff mast in both planes (sideways and torsional).

Flat upper front surface of mast tuttle box head allows to use shims for changing mast rake and creates large contact surface between mast head and bottom of the mast box exactly in place where it matters most.

Standard windfoil mast

eXploder UHM mast

Corrosion resistant alu fuselage

Our aluminium fuselage is protected from corrosion by several coatings. Extra layer of protection is provided by placing sacrificial zinc anode inside the fuselage mast box. Mast fuselage insert is covered by a layer of glass fibre to avoid direct contact between carbon and alloy

Precise rear wing angle adjustment

Simple, precise and fast rear wing angle is a must in a racing windfoil. Using predefined angle shims doesn’t allow to change rear wing angle in a fast and precise manner. Our system allows changing the rear wing angle to within 0,1 degree in just a couple of seconds, simply by squeezing/releasing the hard rubber layer with either the top or bottom screw.

Full range of adjustment – 2 degrees. No more too much / too little power situations!

World Championship proven

eXploder CR windfoils have already won several World, European and National Championship medals in Formula Foil Class:

2019 Formula Foil European Championships (Portimao, Portugal)
2nd – Przemek “Pont” Miarczyński

2019 Formula Foil World Championships (Puck, Poland)

2nd –    Maciek Rutkowski
4th –     Przemek “Pont” Miarczyński
3rd –     Maja Dziarnowska (Women Division)

2020 Formula Foil World Championships (Lake Silvaplana, Switzerland)
2nd –    Przemek (Pont) Miarczyński
4th –     Maciek Rutkowski
2nd –    Maja Dziarnowska (Women Division)

Component selection and trim table.

Please note, this is just a rough guide. Final component selection / trim depends on many other factors and
preferences (sea state, board used, sail size, sail trim, sailor level, sailing style etc) and can only be
determined by spending hours on the water fine tuning in search of optimal setup.

Conditions / bodyweight

Mast rake*

Front wing

Fuselage

Rear wing / angle**

< 10 kt. / 80 kg+

0.50 – 1.50

CR Large CR Regular CR 250 cm2 @2.80
< 10 kt. / 70-80 kg

0.50 – 1.50

CR Large CR Regular CR 250 cm2 @2.50
< 10 kt. / < 70 kg

1.00 – 2.00

CR Medium CR Regular CR 250 cm2 @2.20
10-18 kt / 80 kg+

0.50 – 2.00

CR Large CR Regular CR 250 cm2 @2.40
10-18 kt / 70-80 kg

1.00 – 2.00

CR Large CR Regular CR 250 cm2 @2.10
10-18 kt / < 70 kg

1.50 – 2.50

CR Medium CR Regular CR 250 cm2 @1.80
19 kt+ / 80 kg+

1.00 – 2.00

CR Large CR Regular CR 250 cm2 @2.00
19 kt+ / 70-80 kg

1.50 – 2.50

CR Large CR High Wind CR 250 cm2 @1.70
19 kt+ / < 70 kg

1.50 – 2.50

CR Medium CR High wind CR 250 cm2 @1.40

*mast rake – an angle of the fuselage in relation to the bottom of the board between footstraps as measured with an inclinometer with a board lying upside down (it assumes that mast- fuselage angle is constant at 90 degrees). This is always an obtuse angle.

**rear wing angle – an angle between rear wing chord and the fuselage’s longitudinal axis (rear wing angle of attack).

eXploder foil maintenance and care

  • all the parts of the foil should be disassembled and rinsed in fresh water after each use, unless thread of all screws are covered with special seawater resistant anti-seize lubricant, in which case foil should be disassembled at least once a week.
  • before going out ALWAYS check all the screws for tight fit. Vibration while sailing can (and will) loosen foil screws. Do not overtighten the screws! Use a torque wrench to tighten all screws to 7Nm.
  • always use the sufficient length of screws mounting the foil mast to the board (not provided with the foil). Do not use Philips (cross)  type heads in those screws, as they do not allow enough tension.
    Threads of the screws need to completely go through the foil head barrels. Use ample size of washers in those screws, especially the rear one.
  • Front part of the foil mast head always needs to be in contact with the bottom of the tuttle box. Use extra shims (sold separately) to fill this space if necessary (and to properly set required foil mast rake – see trim guide table).
  • Do not swap front wing mounting screws! They are different lengths and are not interchangeable. Always replace lost screws with exactly the same length and head type / size.
  • Always pay attention to water depth while sailing when launching and landing, especially if any shore break is present. Damaging foil by contact with the sea bottom will not be covered by warranty.
  • When not in use (also on the beach) always use provided wings / mast cover to protect foil sharp edges and prevent any accidents.
  • Caution: eXploder windfoil is a high performance equipment, finished to the highest standards to achieve maximum performance on a race course. Please be extremely careful while mounting and using it, as trailing edges of the mast and wings are very sharp!