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For more info on the RECHARGE foil click here!

I believe I can fly to RECHARGE!
After almost 2 years of research and development Recharge is proudly presenting your new flying machine. Fly over the water in just 8 knots without any need for other new equipment (you can use your deep Tuttle box board and your existing quiver). The RECHARGE FreeRace Foil is a modular system.

How it all started – TEAM:

The dream team composed of inventor/developer Matej Bozicnik, expert of composites Gasper Ovcak, the aeronautic composite genius Simon Ogrinec and the ex-professional windsurfer Tine Slabe had a dream to build a unique light wind flying windsurfing machine that could be used by any passionate windsurfer.

Matej, an expert of ski composites, has helped from the idea to the market some unbelievable inventions that are today a common part of the ski industry. His pedigree reaches out to some of the longest jumps on skies all the way to Amfibia skies and other excellences. Being a windsurfer himself, he understood well, what is needed to build the ultimate foil.

After being involved in the precision microscope business, Gasper with his partners started a composite company, that today builds parts for nobody not less than Ducati. His passion for composites did not let him sleep for months until he found the system to put the vacuum bags through this tiny mast and make it the lightest and most resistant foil mast out there.

Simon is a passionate windsurfer, who is building the fastest model airplanes in the World. Who would better be suited to build the underwater wings? His planes are holding the speed World record of Dynamic soaring in the 60-inch category with an impressive 596 km/h! His practical knowledge brought us to some outstanding solutions of mold building and finally creating very strong and precise wings. But we are already excited for the future.

Finally, Tine Slabe has been a pro windsurfer for 12 years where he started as a freestyler, entered to slalom and finally did some amazing speed results. Over those years he was involved in developing boards, sails, tested endless fins, masts and was always interested to bring the sport to another level. After all those years, he managed to get this amazing team together and finally bring to the market a product that he fully believes in. At the same time, he runs the team, so that the product came to life.

Use of the foil:

For Beginners:

Our intention was to first bring on the market the most overall foil we could. So the RECHARGE FreeRace Foil is the tool that you can use for foiling from day one. The RECHARGE foil is very stable and has the ability to produce a very linear lift, which makes it very easy for beginners in foil. You will be able to control it very well with your feet and sail from the first foiling tries.

For advanced:

Once you will be confident with flying, you will start to get into more exciting direction of foiling. If you want to cruise, race with your friends in upwind - downwind courses or just make the basic freestyle panning tricks, the RECHARGE FreeRace foil will do it for you.

This foil is not meant for is super high racing performance. So if you are looking for the ultimate racing machine, you will still need to wait a bit, as we are in development for it…
Stay with us and we will present it at the end of 2020.

Wind required to fly:

Very often We get asked how much wind a rider needs to fly with the RECHARGE FreeRace. After much testing, we can say with confidence, that in 8 knots of wind a 90 kg rider with a 7.8 sail can fly well with good pumping skills.


Technical specifications:

Mast length = 95 cm
Fuselage length = 100 cm
Front wing area = 840 cm2
Front wing span = 82 cm
Tail wing area = 260 cm2
Tail wing span = 42 cm


Mast = 1500 g
Fuselage = 1720 g
Front wing = 640 g
Tail wing = 160 g

WindFoil parts description:


The mast is the backbone of the system. It has to be stiff and without twist or torsion, which is achieved by using 15 layers of Italian T430 high modules prepreg Carbon. It’s produced in monocoque technology (the same used for Aerospace technology) with Autoclave curing. Also tempering is used to increase mast’s mechanical features. As far as we know, we’re the only producer that offers this state of the art technology in the windsurf world.
Carbon fibers are layered in the direction of torsion forces to increase torsion stability and additional one-way reinforcement has been added for better torsional stiffness. The carbon layers are rewrapped over the front to additionally protect the mast against the hit of the rocks or reefs. Because we wanted to reduce the possibility of damage in the area of open carbon, we use mold pre-shape inserts laying, so the inserts positions for screws are not milled, but already in the mold.
The mast is filled with expanded epoxy, which makes the stiffness and torsion even higher.
For the back edge of the mast, we use high precision edge tuning, which greatly increases the release of the water at the end of the mast.
We additionally reinforced the base of the mast to make it more stiff and durable.
At the end of process we apply finish – coating, which increases mast longevity and surface tension, so the mast is gliding through the water faster.

After much testing, we have decided to start with the length of the mast of 95 cm, as we believe it is perfect for advanced foilers and does not bother the beginners. Since our technology is allowing us to give the right stiffness to this length, we can always go shorter and get even more stiffness.

And the best part is that the mast weighs only 1495 g, which makes it one of the lightest masts in the market with superior performances.


Because of square-shaped cross-section of the fuselage, we have decided to use aluminum 6068. This outstanding material that is often used in the aeronautical and aerospace sector, is also well resistant to salty water.

Specifications: Rm 560 Rp0.2 495 Hardness Hb 145 Elongation 7%
"The alloy EN AW-6082 is a high strength alloy for highly loaded structural applications. Typical applications are scaffolding elements, rail coach parts, offshore constructions, containers, machine-building and mobile cranes. Due to the fine-grained structure this alloy exhibits a good resistance to dynamic loading conditions. EN AW-6082 is certified for use in marine applications."

The fuselage is milled on a high precision HAAS milling machine, which is used also by Formula 1 racing teams. For protection against saltwater corrosion, we are applying the special high-end coating. We tweaked the fuselage shape until we get the best aerodynamic shape. In over one year testing, we find that 1000 mm length is the best compromise between stability and maneuverability.

Mast and fuselage system connection

Even a stiff mast and rigid fuselage can’t make a good combination if the fuselage fitting isn’t up to par. So, our system is using 4 points connection between mast and fuselage to enhance torsional rigidity and crate a single fused, high-performance unit. Our stainless still screws will survive all the saltwater punishment.


After 2 years of study and testing, we finally found a wing design, which is the compromise between functionality and speed and allows early planning. We produce them in Vacuum RTM technology.
The screw inserts are reinforced with full carbon to bypass the problem of over-tightening the screws.
Just like the mast, the wings are finished with High precise edge tuning, to stabilize the water release at the back edge and make the flight more stable and quieter.

Front and tail wing connection system:

The front wing is connected to the fuselage with 3 screws. Because of the milling of the fuselage in the “saddle” style with zero torsional give, the connection gives maximum stability. The tail wing is connected to the fuselage with 2 screws. We have tested the position of the back wing a lot and have decided that we will not apply any options of adjusting, as we believe that freerace clients prefer a plug and play solution.

Choose to RECHARGE!

Find the chance to try one of our flying machines and we are sure, that you will want one since you will recognize that you can fly! It is not just a dream, now is a reality. Today we can fly over water and Recharge our batteries for the life down on earth!