We want to be sure that your Mast is perfectly rigged into your sail to get the best performances out of your rig. The mast is the spine of your sail and as for the human body if the spine doesn’t work properly, the body does not work properly. It is that simple.
Recommendations written on the sail bag are the starting point: Mast length (Luff = mast + extension), IMCS, boom extension. However these recommendations are not always precise due to inches vs. centimetres conversion, poor precision on the extension scale, different rider height that influences the boom extension. In light of the above, please follow these suggestions.
Every sail needs a specific mast although many sails today allow two possible mast lengths by changing the extension to reach the given luff. Beside the advantage to choose between 2 masts, it has to be underlined that a longer mast provide more power to the sail and can be the preferred choice to better exploit light wind conditions. On the other hand, a sail rigged with the alternative shorter mast allow a better control and can be the right choice in overpowered conditions.
It is the industry standard to measure the stiffness of a mast related to its length. Every sail clearly specify the IMCS mast value it needs, every mast clearly specify its IMCS. MaverX checks every mast on the IMCS test machine and discards those with a value +/- 3%.
How to rig the mast
Do not leave your valuable Mast under the sun before rigging it and if possible rig it under shade. Although the patent pending SunCore polymer base protection certainly helps in keeping a lower temperature on the Mast surface and protects it from UV, surface temperature can be still very high and could weaken the carbon fibre of your Mast. After positioning the Mast inside the luff with its extension, do not downhaul it too much but just what it is needed to fit it well inside the luff without having it excessively bent. This way, it will be much easier to clamp the boom on a straight mast wall thus avoiding too much or wrong tightness that is one of the most frequent reasons of brakeage.
Extension or how much downhaul
Insert the extension at the mast base following the sail manufacturer recommendations but being aware that both inches vs. centimetre conversion and a not precise extension scale indicator might be misleading. Having already the boom clamped on the mast at the needed height, downhaul the mast until the second leech from the top is loose ½ way to the luff and the third at about ¼. More (stronger wind) or less (lighter wind) downhaul depends on the wind conditions. The more you downhaul the more loose leech you have thus giving the sail more twist i.e. higher manoeuvrability in overpowered conditions. Many sails have visual indicators on the leeches that help to perfectly trim it.
The boom or how much outhaul
Once finished with the downhaul it is time to go to the clew of your boom and outhaul the rope without using any “easy rig tool” but simply pulling with 2 fingers until you give a good shape to your sail depending on wind conditions. Remember that RDM mast leave more luff available, reason why you need to outhaul 1-2cm more than when the same sail is rigged with a standard diameter mast. The sail battens turn smother on a RDM mast since they skim on the mast whereas using a SDM mast the battens push against the mast wall creating a more pronounced aerodynamic profile. It is clear that for wave and freestyle sails where the rapidity of closing a manoeuvre is also affected by the smoothness of the battens, a RDM mast represents a clear advantage while when using freeride, slalom or race sails a SDM produces that boost of power that is looked after in these disciplines mast by providing the sail with a more pronounced aerodynamic profile that is further enhanced by cambers on slalom and race sails.
Together with the wind what makes our sport magic. The sun is not however our quiver best friend. Therefore at the end of every session on the water, if possible place your rig, sail, boom and mast under shade and always release downhaul to reduce carbon deformation under heat.
If you have chosen a MaverX mast you have gone for quality therefore we believe these suggestions might be appreciated.
NOTE: ALWAYS INSERT A MINIMUM 15 CM EXTENSION INSIDE A STANDARD DIAMETER MAST OR 12 CM INSIDE A RDM MAST.