- 2021 Severne Alien 155L Foil Board
- 2021 Severne Redwing Hydrofoil
Purely designed as a windsurf foil board, the Alien enables all the variables to work in harmony and move beyond simply balancing on a foil to WINDSURFING on a foil. A functional foil board with refined details that makes foiling both accessible AND desirable.
The Alien development program was initiated when the disappointment of bolting a hydrofoil to a normal windsurf board was realized. By analyzing and gaining a deep understanding of the new variables that foiling introduced, we saw that specific foil-oriented equipment was required to elevate the experience to a true windsurfing sensation; blasting in control and carving turns rather than balanced on top, nervously trimming.
The differences between the Alien and a normal freeride are many; shape, length, rocker, stance, pretty much everything. But this new geometry works in conjunction with the foil and rig to deliver balance, and a new windsurfing world to any competent windsurfer. It opens up more locations to windsurf, and can double or triple your days on the water.
Stable enough for your first flights, the Alien has the considered details to deliver performance so as not to be outgrown.
The volume distribution is very important on a foil board as it can be used in much lighter winds than you need to waterstart. So uphauling is an important consideration, and the Alien has enough volume forward to allow traditional uphaul technique with one foot either side of the mast base. A lot of volume in the back half of the board allows you to get into the straps before the board is even moving, and then kick-start up onto the foil.
Shorter length reduces the leverage and lift required by the foil to get the board out of the water and keep it there. So the Alien is much shorter than normal freeride boards, but still has enough length to be able to use the nose area for down-force at high speeds, balancing the lift from the foil. Having some length at the front also softens re-entry, minimizing catastrophic touch-downs.
The width of the board matches the widths of the foils it’s designed for. Too wide and the board has too much leverage over the foil and it’s easy to overpower the foil or not have enough support. Too narrow and the foil can dictate where the board goes. So we balance it up – Alien widths are 65-75cm wide, and designed for similar width foils.
|SIZE||LENGTH(CM)||WIDTH(CM)||FIN BOX||IDEAL SAILS||WEIGHT (KG) (+/- 5%)||RIDER WEIGHT (KG)|
|105||190||65||Deep tuttle foil box||Freek 4.0 to 5.6 / FoilGlide 5.0 to 6.0||7.2||<85|
|115||200||70||Deep tuttle foil box||Freek 4.4 to 5.9 / FoilGlide 5.0 to 7.0||7.3||<95|
|125||210||75||Deep tuttle foil box||Freek 4.8 to 6.3 / FoilGlide 5.0 to 7.0||7.6||<110|
|155||215||85||Deep tuttle foil box||Freek 4.8 to 6.3 / FoilGlide 5.0 to 8.0||8.2||<120|
That’s what foiling means to us. For most windsurfers, foiling has the potential to DOUBLE their time on the water.
Our foil equipment has been designed to get people up and flying easily, safely and with as much fun as possible. By directly understanding all the variables ourselves, we have made the design choices to deliver a foiling experience that will expand your windsurfing world.
/ 900mm mast
/ 950mm fuselage
/ 1400cm2 front wing
/ 350 cm2 tail wing
Foiling is more fun when you’re not bleeding. So we considered every component and how it’s user friendliness could be improved.
/ All wingtips have rounded tips and are curved down, away from kicking feet.
/ Wing covers are designed to stay on during setup, minimizing accidents while on land.
/ 90cm mast gives enough height for correct technique, minimizing both touchdowns and breaches. / Rigid aluminium hardware delivers consistent, reliable lift which increases control.
Rigging up has never been the most fun part of windsurfing. Adding a foil can increase the complexity, so we have focused on making it as easy as possible.
/ Minimal bolts mean less to install.
/ Only 2 different bolt types – short bolts for the wings, and long ones for the mast.
/ A single tool required. The 5mm Hex Key was selected for it’s long-term reliability, the abundance of compatible tools (many sails use this size for batten tension), and easy replacement of bolts.
/ Plug in connections between fuselage/mast and fuselage/front wing.
If you’re flying half a metre out of the water, you don’t want that front wing moving around underneath you. Rigidity is the key to holding the wings in a consistent position. Rigidity allows you to lock in and windsurf on the foil, rather than riding a bucking bronco.
/ Mast geometry maximizes stiffness. 19mm thick x 145mm wide. Much stiffer both longitudinally and torsionally than most carbon masts.
/ Spigot on fuselage locks into the mast section.
/ Fuselage uses straight sections for directional stability, and to maximize the strength/weight ratios.
/ 4x connection surfaces on the front wing connection reduces any movement.