PLATINUM AERO 3.0 SERIES

The importance of the mast is usually extremely underrated. In fact, the mast is comparable to the transmission of a car. Or in other words, a Ferrari with only one gear is not very fast, only the correct transmission maximizes the potential of the engine into v-max. 

When you compress a mast using downhaul tension every mast has a specific bend curve. This bend curve has to match with the luff curve of your sail to work in conjunction with the sail. On the other hand if the mast has a different bend curve than the luff curve of your sail both parts work against each other. Therefore it is utmost important to buy the right mast for your sail.
To say it load and clear: a wrong mast will destroy min. 30% of your sails performance or in other words will turn a winner into a shit sail!
The only other thing you can do to kill your sails performance is wrong/insufficient downhaul tension.

At DUOTONE we use a Medium Constant Curve for our masts (our bend percentages range between 61-63 bottom and 75-77 top depending on model and length). As this curve sits right in the middle within Constant Curve masts it offers the biggest compatibility of any bend curve. This makes our masts and sails the most compatible on the market.

HERE IS HOW GOOD OTHER BRAND SAILS WORK WITH OUR MASTS AND VICE VERSA:

1. Challenger Sails, Ezzy, GA (2017 on), Goya, Gun Sails, KA Sails, Loft Sails, Naish Sails, NeilPryde (RDM masts), RRD, S2Maui, Sailloft, Sailworks, Severne (2014 on)
   >> 80-90% (depending on model and size)
    
2. Hot Sails, NeilPryde (SDM masts), Point7, Simmer Style
   >> 70-80% (depending on model and size)
    
3. Avanti, Gaastra (until 2016), Maui Sails, Severne (until 2013), Vandal
   >> Not compatible

1. MAST STIFFNESS

Your rig is like a birds wing, it's not a static but a dynamic object. Everything above your boom is under permanent movement to react/adjust to changing wind conditions (wind strength and -direction) as well as to water movement. 
There is a simple rule across all masts: the longer the mast the stiffer it is or better saying it has to be. This is simply due to the fact that the bigger the sail area becomes the more support it needs from the mast. In a way the mast is the backbone of your rig.
What happens if a mast is too stiff or too soft for the sail (size)?
1. Mast too stiff: the rig becomes super hard to control (especially when powered up) and uncomfortable (exhausting) to sail as the mast doesn't flex enough e.g. when a gust hits your sail
2. Mast too soft: a too soft mast reduces the profile in the sail (as it bends too much already when downhauling the sail). Plus it bends too much with every gust. This both reduces the performance of your sail.
Your body weight also plays a role here. On the same sail a 60 kg lightweight will want to use a slightly softer mast than a 90 kg heavyweight sailor.

2. MAST DIAMETER (RDM VS. SDM)

There are two diameters existing:
1. SDM (Standard Diameter Mast) with 48,5 mm inside diameter at the bottom
2. RDM (Reduced Diameter Mast) with 32-33 mm inside diameter at the bottom
RDM masts make sense only up to lengths of around 430 cm, since they show a rather soft flex behaviour 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 manoeuvres.
On the other hand larger, 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. 

3. CARBON CONTENT >< WEIGHT >< PERFORMANCE >< PRICE

Compared to glass fiber carbon is

1. a much stiffer fiber:
   Due to this higher stiffness less material/wall-thickness is necessary which ultimately results in a much lighter mast. The weight of the mast has an increadible influence on how light the whole rig will feel in your hands. No joke compared to a 50% carbon mast with a 100% carbon mast your rig will feel as if it would be 1 square meter smaller! And this is something everyone from beginner to World Cup pro will immediately feel and appreciate. 
    
2. a much faster reacting (responsing) fiber:
   When a gust hits your rig it twists off to absorb the sudden energy peak (instead of pulling you into a catapult). But the mast has to reflex back in order to generate forward movement. The faster this happens the faster the rig is ready for the next gust/impact.
    
3. a much more expensive fiber:
   Unfortuantely carbon fiber is 10-20 times as expensive as glass. Means the higher the carbon content the more expensive the mast is.

1. Point loading is the masts' first enemy
   Always protect your mast from impact damage or point loading. Carbon is very vulnerable to impact damage. Even if there is no visible damage, the mast may be seriously damaged if it is dropped or knocked, which will, when put under load, result in breaking. For storage, transportation or simply whenever not being used, ALWAYS store your mast in a protective mast bag.
    
2. Sand is the masts' second enemy
   Before rigging up please make sure that all your rig components (mast extension, mast top and base, mast sleeve, cambers, boom front-end) are absolutely free from sand and grit.
   If you don't want to end up with a one-piece mast (no joke) please always make sure not to have any sand inside the top part or on the connection joint of the base when putting both parts together. If you want to be on the safe side secure the gap between the base and the top using tape. 
    
3. No downhaul tension over night
   In order to generate maximum performance your mast should be straight when not under tension. Due to the massive downhaul tension though over time eventually every mast will take a bit of pre-bend. Once this happens it will only get worse as the mast automatically twists into its pre-bend position when downhauling the sail. The only thing to keep your mast straight for as long as possible is to release the tension while not in use. Means do not leave your sail under full downhaul tension over night.
   That's also the reason why bending is excluded from our unconditional warranty.

DUOTONE SENTEX masts are extremely light, incredibly balanced and are far superior to other masts in terms of handling and reflexes. Thanks to the revolutionary SENTEX material structure, they are also phenomenally durable and resistant to stress, which is why SENTEX is also used for the PLATINUM boom. 

WHAT’S THE SECRET?
SENTEX is a highly developed composite material used exclusively by DUOTONE. It contains the highest-quality Toray resins which, in combination with the carbon fibres, achieves unique durability while keeping weight to a minimum. SENTEX masts and booms are light as a feather in your hands and are far less liable to being broken. In addition, the masts have an outstanding level of reflex and the booms are extremely stiff.

THE MATERIAL
SENTEX is made from the highest-quality carbon fibres and resin impregnated with silicon nanospheres. This technology produces a unique material structure which is more stable and noticeably lighter than regular carbon. The key reasons for this are the two advantages of silicon nanospheres:

1. The even distribution of nanospheres in the resin creates an extremely balanced rigidity across the entire mast length and ensures incredibly immediate and balanced reflexes.
    
2. Silicon nanospheres deal with compression force better than any other material known. This makes our SENTEX masts and booms at least 30 % more resilient and durable than standard carbon products.

Because SENTEX is far more stable, not as much material is normally needed, which is why the products are lighter than similar models. More specifically, this means a weight saving of up to 20 %, which is exactly why all DUOTONE PLATINUM booms and RDM masts are the most lightweight in their class worldwide.

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. 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.

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

Most brands nowadays use T400-500 for their top-level carbon masts. At DUOTONE we use T600 carbon for all BLACK masts, T700 for all SILVER and GOLD masts, T800 for all PLATINUM masts and T900 for the PLATINUM Aero 3.0 masts.

Another advantage of the high quality carbon fibers is that you can reduce the resin content. For example the T900 fiber used for the PLATINUM Aero 3.0 mast allows us to reduce the resin content by 30%. This results in the lightest mast on earth.