We are so convinced about the carbon qualities, the technology and the processing that we offer a two year unlimited warranty from now on all our masts (except PLATINUM AERO!)
SENTEX™ - UP TO 30% LIGHTER AND MORE DURABLE
Silica Spheres (diameter: 100nm)
Thousands of nano sheres surround every individual carbon fibre giving a very even distribution of the particles throughout the resin.
Carbon fibers (dm: 7 micron)
Hundreds of fibers run the length of the mast providing flexibility and strength.
Enhanced fortified matrix resin which supports and bolsters the carbon fibers to withstand a far higher degree of bending and loading than ever before.
NorthSails SENTEX™ Windsurf masts are the best masts we have ever produced. They are beautifully balanced, lightweight with crisp clean actions that provide both industry leading handling and reflex characteristics. They are also phenomenally strong thanks to the revolutionary nature of our new SENTEX™ material.
SENTEX™ is the trade-marked brand name for NorthSails most advanced composite rod material. All SENTEX™ products utilize a Toray matrix resin. The specific mix of material used for SENTEX™ is exclusive, and therefore unique, to NorthSails. The improved strength/reduced weight was the headline for the technology, but the masts shine for a different reason—they’re an absolute joy to Windsurf with. The masts feel light as a feather in hand and generate a superior reflex whilst delivering the highest breakage resistance.
SENTEX™ is carbon fiber held together with a resin impregnated with silica nano spheres. This technology is brand new and produces a material that is significantly stronger and potentially lighter than traditional carbon fiber. There are two key advantages provided by silica nano spheres: The even distribution of the nano spheres throughout the resin providing equality of strength throughout the blank leading to crisp and clean mast reflex. The second advantage is that silica nano spheres resist compression forces better than any other known material. This results in a mast that is at least 30% stronger than a standard carbon fiber mast without interfering with the action. The improved compression characteristic also greatly improves impact resistance and durability.
Because SENTEX™ material is stronger, in some cases less material is required and thus a mast can be lighter than an equivalent carbon fiber model. Weight savings of up to 30% are possible. That is the reason why every single NorthSails RDM mast is now the lightest on the market in its class. NorthSails SENTEX™ masts are the best masts we have ever produced. Are they the best masts in the world? That's for you to decide.
CARBON FIBER QUALITIES
THE essential quality criterion of carbon fibers when used for Windsurf masts is the bending-elongation of the fiber.
The elongation measures the traction during bending until the fiber finally breaks. For a Windsurf mast this means: The higher the bending-elongation value of the carbon fiber raw material:
→ The faster the reflex speed (which ultimately increases the performance of your sail, similar to increased horse power in a car)
→ The higher the breakage strength
Carbon fibers are available with bending-elongation values between T300 and up to max T1000 with the T1000 carbon being 10-times as expensive as cheap T300 carbon. The lowest quality carbon fibers used on Windsurf masts have an elongation value of T300-400. This carbon has a bending-elongation that is just slightly higher than glass fiber. Therefore it’s used on cheap “low-percentage carbon masts” only. 80% of all brands nowadays use T400-500 for their top-level carbon masts.
NorthSails uses T600 carbon for all Red and SILVER masts, T700 for all GOLD and PLATINUM masts and T800 for the PLATINUM Aero masts. Another advantage of the high quality carbon fibers is that you can reduce the resin content. For example the T800 fiber used for the PLATINUM Aero mast allows us to reduce the resin content by 30%. This results in an unmatched low weight without the usual loss of durability.
NorthSails CARBON FIBER QUALITIES
Silver Series: T600
Gold Series: T700
Platinum Series: T700
Platinum Aero: T800 with 30% reduced resin content
Introduced in 2001 the ALUTEX winding (on the base) gives even 100% carbon masts an unmatched durability.
are so convinced about the superior durability-values of the PLATINUM masts that as the first brand ever we offer a 2.YEAR.UNCONDITONAL.WARRANTY on a 100% carbon mast.
RDM vs. SDM
In general there are two diameters,
the SDM (standard) and the increasingly popular RDM (reduced) mast diameter. Not everyone knows that RDM masts make sense only up to lengths of around 430 cm, since they show a rather soft flex behavior as a result of their smaller cross section. Therefore, they are primarily suitable for Wave/Freestyle sails
with the additional advantage that they are easier to grip during maneuvers. On the other hand large, mostly performance-oriented sails need stiffer masts with a “more direct“ flex. This characteristic demands a larger mast cross section in order to ensure reaching the required stiffness.
NATURAL WHITE POLY.SHIELD SURFACE PROTECTION
Now often imitated but still unrivaled:
A groundbreaking development in the NorthSails mast construction is the POLY.SHIELD coating. This is a highly abrasion-resistant material that is also used for ski and snowboard bases and is unique in its capabilities. Carbon fiber is very stiff, but not particularly resistant to abrasion. Especially in the area of the boom and camber, but also at the mast leading edge, the carbon fibers are now effectively protected by the POLY.SHIELD against abrasion. As the only brand we use un-dyed polyamide, in its natural white color, which improves the abrasion resistance compared to dyed polyamides by 20%. The POLY.SHIELD covers the entire surface of all PLATINUM and GOLD masts, as well as the base of the SILVER SERIES! This means no more wear, scratches or damage to the carbon fibers.
NEW MAST MEASURING METHOD
for significantly improved bend curves and increased breakage strength
The industry standard IMCS mast check method meanwhile is over 30 years old. The bend curve families Flex Top, Hard Top and Constant Curve are set too wide and un-precise for modern performance sails. A so-called Constant Curve mast that almost corresponds to a Hard Top mast has nothing in common with a Constant Curve mast, which is close to a Flex Top mast. In order to clearly document that the bend curve of all our masts lies between these two extremes, from now on we label this curve with MEDIUM.CONSTANT.CURVE. Through the introduction of a new type of hydraulic mast measurement system with digital control technology (combined bend curve and crash check) now it’s possible to adjust the bend curve over the whole length and find ways to improve the breaking strength. Ongoing tests thus guarantee a reliable quality control.
Thanks to our new mast measuring and our refined IMCS system, we were able to analyze the masts of all other brands. This allows us to say exactly how good NorthSails masts work with other brand sails or which masts from other manufacturers are compatible with NorthSails.
NorthSails compatible masts/sails: Aerotech / Avanti Sails / Ezzy Sails / Goya Sails / Gun Sails / Hot Sails / KA Sails / Loft Sails / Maui Sails / Naish Sails / Sailloft / Sailworks / Severne
NorthSails partly compatible masts/sails (at about 30-40% performance loss): Challenger Sails / Point 7 / RRD / Simmer Style / XO Sails
NorthSails incompatible masts/sails:
HARD TOP: F2 Sails / Gaastra / Vandal
FLEX TOP: Hot Sails / Tushingham / Neil Pryde / Attitude Sails