BOW 8.7

Incl. 19% VAT, excl. Shipping Cost
In stock


The BOW has established itself as a concept sail and inspires more and more windsurfing enthusiasts. Thanks to its innovative and unique ability to adapt dynamically over a huge wind range while continuously delivering the same amount of drive, it brings a new riding experience to windsurfing that other sails are unable to do.

Windsurf Sail Program Windsurf Sail Character

> 4 Cam Concept Sail for Freerace, Slalom and Foil
> 2 offset clew claws for trim flexibility and easy use of a trim system
> No Loose Leech, the Bow uses more surface
> Special friction bearing that allows rotation of the mast
> 3D Mast Sleeve Shape and Cross Batten Concept
> Neoprene Cover at boom opening for better aerodynamics
> Tack Strap to regulate the tension of the sail foot
> Bow Flex mast 2.0 is mandatory

The special feature of the BOW: the sail outline with an extreme bending line in the top. This bending line is made possible by the BOW Flex mast, which is also the core of the development. The specially manufactured mast works even more intensively with the sail than with a conventional rig. With the help of a special fitting, the Friction Bearing, the mast has the ability to rotate slightly within the boom front end. This allows the sail profile to continuously adapt to any condition, even without loose leech. The BOW still remains easy to handle. The Clew Claws, which are used instead of clew eyelets, make the use of a trim system much easier. Another plus point: Thanks to the deep profile with 4 cams, the BOW can accelerate effortlessly to top speed and convinces with perfect performance and versatility, whether in the disciplines of foil, freerace or slalom.

Convinced? Then become part of the BOW community and experience the future of windsurfing.


Cam Top IMCS Best Mast** Mast
6.9 198/205 493 7/7 4 fix ./. Bow Flex 70 % 490
7.8 216/224 504 7/7 4 fix ./. Bow Flex 70 % 490
8.7 230/237 519 7/7 4 fix ./. Bow Flex 70 % 490

* Lower eyelet / Upper eyelet
** The Bow Flex Mast is mandatory for the Bow sail



With the BOW sail the GUNSAILS R&D team introduces a completely new concept in sail design.
Within 2 years of continuous development, Pieter Bijl and Renato Morlotti have managed to realize this innovative idea in a sail. The BOW offers new dimensions in handling and wind range and shows a unique efficiency. With its adaptive capabilities, the BOW delivers constant power and effortless drive across a huge wind range.
The sail is not only perfect for foiling, but also provides a new feeling of windsurfing on a freerace or slalom board. This innovative concept also includes the specially developed BOW FLEX mast, which is rotating within the sail.


The BOW concept is based on a new sail outline with an extreme bending curve in the top. This extreme curve is only achievable with the BOW FLEX mast.
Due to the low luff tension and the innovative design, the sail does not have any loose leech. In the following the functionality of the BOW concept is explained in further detail.



Thanks to a special friction bearing, which allows the mast to rotate within the boom, the mast can rotate inside the sail, thus allowing the upper area of the sail to twist and bend away.
In contrast to the Loose Leech concept, where only a small part of the leech twists, the BOW has a much larger area to adapt to the strength of the wind.
When the wind strength and thus the wind load in the sail increases (high loading), the upper part of the sail turns leeward and the profile adapts dynamically.
The holding forces on the boom remain the same. Only the profile adapts to the higher loading.
When the wind force and thus the load in the sail decreases (low loading), the sail turns back to its original position. Now, the lower wind energy is compensated by the more efficient profile.
The drive as well as the holding forces remain the same. This ability facilitates handling enormously and also improves performance while going upwind.
The described adjustment of the BOW is more dynamic and effective than the Loose Leech mechanism. Due to the well defined and firm edge at the leech, there is no fluttering and the associated small stalls in the profile.
Similar to a Loose Leech sail, the BOW regulates itself in gusts and wind holes, but the available area is larger and more efficient. Thus, it covers a much larger wind range in total.
For the windsurfer, this ability leads to an effortless and comfortable windsurfing experience, combined with the performance and drive of a camber sail.
Due to its continuous drive and feather-light handling, the BOW sail is predestined for foiling.



The ground of any sail design is based on a tension triangle that is created between the clew, top and mast. This is also the area which can be actively controlled by the windsurfer at the boom. The special outline of the BOW sail allows it to have a bigger area within the tension triangle. The now bigger area of the sail that can be directly controlled by the windsurfer, does lead to a significant increase in efficiency and control. A BOW sail can therefore be chosen in a smaller size compared to a Loose Leech sail.


Current sail concepts have the ability to adapt to a certain degree to the prevailing wind force. The area that allows the load to be redirected from the sail is called the release area. Marked in blue here. The adaptation of the BOW sail, caused by the rotating
and very flexible mast, enlarges the release area considerably and lets it extend far into the sail profile. In the marked area, the profile changes depending on the wind force. It is precisely this relatively larger area that makes the unique adaptability of the sail possible. However, most of the release area remains within the Tension Triangle. That means, although the profile adjusts continuously, it retains its efficiency and can be easily controlled by the windsurfer.




A GUNSAILS windsurf sail is a combination of selected and high-quality materials, combined with years of experience and construction knowhow. Sail designer Renato Morlotti is responsible for the performance and quality of the sails. In his working environment he has optimised everything down to the smallest detail. Every piece of material in the sail is continuously improved in terms of durability and weight savings. Only a closer look reveals the quality, good manufacturing and durability of a GUNSAILS sail.