Team SEVERNE: First make sure you’re using a sufficiently sized foil front wing. To improve upwind performance, try a higher clew position for increased back-hand pressure. If needed, reduce downhaul by 0.5cm to slightly close the sail’s head.

Team SEVERNE: Most common issues are insufficient downhaul or clew position too high. Add downhaul to help release power efficiently. Lower clew positions improve flight characteristics and control.

Team SEVERNE: Whereas on the fin you get the best performance when you are full to over powered, on the foil, you want to jump down one size as quick as you can to gain glide and control.

Team SEVERNE: Poor cam rotation typically results from insufficient downhaul or a boom that’s too short, which forces battens and cams forward during rotation.

Team SEVERNE: Same as for the Mach series, check the batten tension and mostly check if the cams have an even pressure. In the unlikely scenario that your cambers have too much pressure on the mast (providing you are using a SEVERNE mast), you can remove spacers one at the time until you find the correct cam pressure.

Team SEVERNE: Check downhaul and batten tension. Insufficient batten tension allows profile migration during gusts. In foiling, use lower clew positions – this is the current trend for releasing power as soon as you’re flying.

Team SEVERNE: Add a little down haul and proportionally more out haul. You might need to extend your boom by one size setting.

Team SEVERNE: You can move the mast base forward first of all. Then lower the boom by 2-4 cm and use longer harness lines .

Team SEVERNE: The rig should feel autonomous – light in the hands with efficient power release while maintaining drive through lulls and upwind performance. Once you get the settings right, your rig will feel effortless in your hands.

Team SEVERNE: The sail has to have enough release without flapping in the top. Apply as much down haul as you can until reaching a point where the sail starts flapping in the top panels. That means you have to stop and actually go back releasing 0.5 cm and you should have the best setup.

Team SEVERNE: Not recommended for foiling. Maintain high outhaul tension for neutral handling once you’re flying. It will enhance flight stability.

Team SEVERNE: Yes you can. But it shouldn’t be touching all the way, only up until the middle of the boom.

Team SEVERNE: Essential for foiling. Proper boom tension is more critical than precise downhaul. Can extend wind range by 2-3 knots in both low-end and control.

Team SEVERNE: It’s really important especially if you are a racer . If you don’t race, it’s also a great advantage to not have to throw the sail down to adjust the outhaul. I’ll remind you once again that you’ll typically be adjusting your outhaul multiple times during a session.

Team SEVERNE: Add only moderate downhaul in relation to your standard settings. But before adding more downhaul, first increase outhaul tension, then lower clew position.

Team SEVERNE: More!

Team SEVERNE: Maintain consistent settings across conditions. Adjusting clew position is more effective than modifying downhaul for me. For extremely light winds, reducing downhaul by 0.5cm can add power.

Team SEVERNE: Usually the ideal downhaul tension works in most conditions. If you sail really under powered you might want to try and sail a bulkier sail by releasing the downhaul by 0.5cm.

Team SEVERNE: If you’re feeling lots of back hand pressure you might want to add more outhaul. If sailing upwind, same. If the wind drops it is good to release some outhaul.

Team SEVERNE: You can note down the distance between the sail pulley and extension pulley after a good session. Note that sail stretch may reduce this gap over time. Visual reference marks between battens 2 and 3 (from the top) can help maintain consistency.

Team SEVERNE: I usually add a dot with a marker to note where the sail opens on the third panel counting from the top. This way I will always have a visual reference to my ideal downhaul setting. I do the same for the mast base on the board. Regarding boom and extension; if I like a size setting more or less than what is suggested, I do note it on the part itself with a marker pen.

Team SEVERNE: Critical. The HYPER 8 is designed specifically around SEVERNE mast characteristics. While other masts may fit, optimal performance requires the designed mast curve, nervosity and reflex response.

Team SEVERNE: The mast is the most important part of the rig. Even though masts with similar curves might work decently, your sail is tested and developed on SEVERNE mast and it is really important to use it.

Team SEVERNE: Always attempt to maintain consistent boom height. Lower 1-2cm if you’re experiencing nose lift or front foot slip. Raise 1-2cm if your board shows nose-diving tendency.

Team SEVERNE: I aim for shoulder high or a little lower than that. Usually I don’t change it according to the conditions. If I am really over powered I lower it a bit.

Team SEVERNE: Use shorter lines in light winds to stay close to the rig. Longer lines in stronger winds allow more distance from the sail during gusts, improving control. Adjustable lines are definitely recommended.

Team SEVERNE They do change according to wind strength. I use 34-44” for light wind with sails 9.0/8.0 and 40-48” for 7.0/6.0/5.0/4.0

Team SEVERNE: Foil race sails suit foil riders that seek consistent power delivery. Waterstart ability is the minimum requirement, otherwise you’re good to go, even if you haven’t nailed those foil gybes yet.

Team SEVERNE: Same as on the fin I would say you can jump on a race sail when you are comfortable sailing and pushing the speed limits of your freerace gear. Also at this point, you shouldn’t be crashing too much, even though you aren’t nailing the gybes yet.

Team SEVERNE: Batten tension is crucial, especially when your sail is new. Focus on the battens that connect with cams. . Re-tension after first session due to initial stretch, then check every 5-6 sessions.

Team SEVERNE: Yes you need good tension on the lower 4 battens (from the top) as these battens connect with the cams, and they provide the majority of the stability. The top battens can be tensioned more neutrally. If your sail is new, check out the tension every 3/4 sessions as the sail stretches slightly.

Inside clew: 

Used with smaller front wings when sailing at high speeds over 28-29 knots, often reaching 33-35 knots.

+ Enhanced glide with superior release characteristics and improved gust control

– Reduced planning ability and acceleration when underpowered or sailing upwind

Outside clew:

The outside clew delivers enhanced low-end power, making it the preferred choice for 60-70% of regular customers who utilize larger front wings. While these wings create additional drag and require more driving power, the outside clew position excels in all wind conditions, whether stable or gusty, enabling you to point naturally with great efficiency.

+ Superior low-end power, enhanced planning and upwind performance, improved ability to power through wind holes, optimized for driving larger front wings

– Slightly reduced crosswind speed in perfect conditions when using smaller front wings at maximum power

The Hyper 4.0 and 5.0 rig on RDM masts.
The Hyper 6.0 – 9.0 rig on SDM masts.

Follow the recommended settings and work your way from there.

The Mach 9 is a dedicated slalom sail that is compatible with the foil. The Hyper 9 is a foil specific slalom sail.

Please look at the “Knowledge” section above that includes the video with detailed rigging guidelines.

Yes, the Hyper 4.0 & 5.0 rig on RDM masts, therefore are delivered with RDM cams.

All of our development, testing, rigging, and tuning are done using Severne masts. We don’t test the performance or bend curves of other masts, and can not guarantee which performance or durability you can get out of your sail using a different brand mast. Therefore, we strongly recommend our customers use SEVERNE masts.

You can order repair material from your local dealer or distributor. Use the dealer locator to find your nearest SEVERNE dealer.

The HYPER 9 is a race sail, The FoilGlide is a freeride sail.
The HYPER 9 has higher top speeds.
The HYPER 9 is heavier.
The HYPER 9 has more battens and more cams.

RDM red for the 4.0 and 5.0 sizes.
APEX PRO or APEX for 6.0 – 9.0 sizes.