Unique Aramid frame panel lay out
Tested in heavy shorebreaks!
Overlapping panel reinforcements at clew and tack
Overlapping batten pockets
The battenpockets are made by overlapping the panel below and above to both sides of the batten pocket rather than joining the panels with a single seam in the middle and slapping the batten pocket on top. This gives a double seam and a fully symmetrical profile. Both seams are double stitched.
Double ring clew
Use both rings for the average position.
This is also stronger for if there is a heavy shorebreak.
The top ring can be used for light wind+taller sailors,
the lower ring for high wind+short sailors.
Most wave sails are cut flat or nearly flat with substantial batten rotation, such sails require a certain amount of wind to power up. Other sails use too much seam shape with completely derotated battens, these sails do not depower well and on the leeward side the battens do not line up with the mast giving less power because the mast is not used to increase the airflow across the sail.
Full rotational sails with no or very little seam shaping:
Pro: perfect depowering, smoothest power build up, smooth rotation.
Contra: smallest windrange, profile need more wind to fill, resulting in less power in low wind, profile is no set in the sail resulting in less profile stability.
No batten rotation, full seam shaping:
Pro: big windrange, more power in light winds, profile stability in high winds.
Contra: Contra: does not depower, more drag in light wind down the line wave riding, jerky. Not as much power as can be since the batten tips bend back so far, the mast pocket does not form a smooth shape on the leeward side of the sail.
Semi rotational, half batten rotation, half seam shape:
Pro: Good depowering (battens want to become straight), smooth power build up, smooth rotation, big windrange, most powerfull, good profile stability.
Contra: Not as good depowering as can be but close, not as much profile stability as can be but close.
Witchcraft sails are semi-rotational, with half the shape coming from batten rotation and the other half of S-curved seam shaping. The batten tips are thinner so the sail fills easier with wind and at the same time this provides for more profile stability.
Seam shape also gives more profile stability which is also of use in higher winds and gives a bigger wind range when used in the right amount. This makes that Witchcraft Sails sit in between the 2 extremes of fully rotational or fully derotated sails (which for some reason did not exist so far in wave sails).
The sails have proven to be at least as powerfull in light winds as sails with a lot of seam shape due to the smooth flow on the leeward side but can depower very well, making the sails feel lighter with a better handling. The rotation is butter smooth, a little dampened and powers up more smoothly than soft or derotational sails in moves.
THE PROFILE DEPTH MORPHS THROUGH THE RANGE, THE SMALLER THE SIZE THE LESS SEAM SHAPE AND THE MORE BATTEN ROTATION.
In this way a smaller biggest sail can be chosen. Not only does being able to use a smaller sail save weight but also gives you a stronger rig. The smaller the sail the less loading a wave can put on the sail and a smaller sail exerts less leverage on your mast and boom, it’s a win win situation.
In the clew there are 2 eyelets to cater better for taller or shorter sailors or to finetune the amount of leach twist. Using both eyelets (see rigging manual) will give the average setting.
THE CONSTRUCTION IS ABOUT THE BEST POSSIBLE
There is lots of Kevlar X-ply and all panels are layed out into the forcelines, similar to the new membrane sails but less cost intensive, much more puncture resistant and easier to repair if necessary. The batten pockets are made with overlapping panels, creating a symmetrical sail shape and giving a double seam for extra strength without costing extra weight.
All important seams are double and running along the stress lines and are not put randomly across stress line for optical reasons. Also at the clew and tack, the joining panels widen again to overlap and create the reinforcement by the panels itself rather than needing all reinforcements being stuck on.
Not 100% happy with standard seam tape, we chose a better type which keeps it adhesion far longer and does not suffer from contact with water.
WE AVOIDED THE USE OF THE SUPER THIN SCRIM
After our first tests we found the thinner laminates were failing too quickly. Our unique testing area on Fuerteventura’s north shore saw us destroy conventionally built sails within weeks. By carefully specifying our materials the end product is only 50g heavier than a sail made from light weight laminate but the durability is greatly increased.