מנור לגלישת רוח SILVER SERIES VTS

מידע נוסף

BEND CURVE: NEW-SCHOOL/WAVE VS. CLASSIC/RACE

1. NEW-SCHOOL/WAVE CURVE
   On New School shaped booms the curve is concentrated in the first 25-30 cm while the rest of the boom is straight. This means that you don’t need to twist/bent your front hand even on smaller (wave) sails as it’s still positioned within the straight part.
2. CLASSIC/RACE CURVE
   Classic shaped booms have a curve ranging further back to approx. 45cm. On smaller (wave) sails this means that the front hand is twisted/bent resulting in increased fatigue or even hand-wrist pain.
   The larger the sail though the more the draft (and with it your hands) moves back so that the front hand isn’t twisted anymore.
   Bigger sails also have a deeper profile. Classic shaped booms with their curve ranging further back make the boom become wider in the middle avoiding the sail touching the boom.
   Therefore classic shaped booms are still the first choice for larger sized freeride/slalom sails (6.5 and up).

MATERIAL: CARBON VS. ALUMINIUM

Carbon booms are 3 to 5 times more expensive than aluminium booms. The reasons for this drastic price difference are the massive difference in the raw material prices and the fact that a carbon boom is 100% custom/hand made.

Since carbon is a much stiffer raw material than aluminium carbon booms offer 4 essential advantages:

1. When a gust hits your sail you need to pull hard to avoid loosing control. A softer boom bends more the harder you pull. This sideway bend results in the boom to become shorter. When the boom gets shorter the sail becomes fuller/baggy = loss of control.
   The longer the boom (180 and up) the more obvious the difference in stiffness becomes.
2. Carbon booms can be made much lighter (up to 20%) while still offering at least 20% higher stiffness.
3. With carbon you can go for thinner diameters (up to 4 mm) while still offering at least 20% higher stiffness. In general the thinner the tube diameter the more comfortable it becomes to hold on to. This becomes very obvious once you go back from a thin diameter to a thicker one.
4. Carbon does not bend. Therefore a carbon boom usually lasts 3-4 times as long as an aluminium boom because any overload (crash, catapult, ..) will eventually result in a bent boom.
   Also due to the fact that carbon doesn’t corrode a carbon boom requires much less care than an aluminium one. Check the condition of the ropes once in a while and worst case get the grip replaced and a carbon boom will last for years to come.

CAN I REALLY USE THE COMPLETE LENGTH RANGE OF THE BOOM?

Under usual conditions yes. But for super heavy usage you need to differentiate between carbon- and aluminium booms.

• The worst case scenario on a carbon boom is a breakage when massively overloaded. Carbon booms do not bend though. Therefore carbon booms can be used without any limitations even when fully extended.
• Aluminium though can break and bend. Therefore a heavy rider and/or overloading (e.g. wipe-outs/catapults or landing super high jumps) might cause an alloy boom to bend when fully extended. As a guideline for really heavy (ab)use do not use the last 15-20 cm of the boom range.

IFRONT 2.0