MACH 4 _PRO SLALOM

ENGINEERED TO WIN. THE MACH4 IS PURE SLALOM.

With a bias towards traditional, full-power slalom racing, updates to the Mach4 geometry also improve performance when used on foil.

A higher aspect ratio reduces chord lengths, limiting any draft movement and increasing efficiency. Back hand pressure has been maintained, so when you need to switch on the afterburners the power is ready.

The Mach4 features an open leech, reducing drag and improving aerodynamics. The higher Centre of Power demands respect, but rewards with aggressive performance. Race to win.

UPGRADES FOR 2021
/ HIGHER ASPECT RATIO
/ IMPROVED FOIL PERFORMANCE
/ HIGH VISIBILITY SLEEVE

CONSTRUCTION NOTES
/ MONOFILM BODY – MAXIMUM STABILITY AND PERFORMANCE
/ KEVLAR X-PLY LUFF SLEEVE – MINIMAL VERTICAL STRETCH WITH HORIZONTAL ELASTICITY
/ TUBE BATTENS – HIGH PERFORMANCE STABILITY

MACH 4 _PRO SLALOM

ENGINEERED TO WIN. THE MACH4 IS PURE SLALOM.

With a bias towards traditional, full-power slalom racing, updates to the Mach4 geometry also improve performance when used on foil.

A higher aspect ratio reduces chord lengths, limiting any draft movement and increasing efficiency. Back hand pressure has been maintained, so when you need to switch on the afterburners the power is ready.

The Mach4 features an open leech, reducing drag and improving aerodynamics. The higher Centre of Power demands respect, but rewards with aggressive performance. Race to win.

UPGRADES FOR 2021
/ HIGHER ASPECT RATIO
/ IMPROVED FOIL PERFORMANCE
/ HIGH VISIBILITY SLEEVE

CONSTRUCTION NOTES
/ MONOFILM BODY – MAXIMUM STABILITY AND PERFORMANCE
/ KEVLAR X-PLY LUFF SLEEVE – MINIMAL VERTICAL STRETCH WITH HORIZONTAL ELASTICITY
/ TUBE BATTENS – HIGH PERFORMANCE STABILITY

021 Mach4LuffBoomBattensCamsWeightHeadMastSDM/RDMEnigma BoomExtension
5.040017674 x RDM4.25FIXEDSEVERNE 400/370RDM or SDMEnigma 160Triple X
5.541118474 x RDM4.45FIXEDSEVERNE 400RDM or SDMEnigma 160Triple X
6.243319074 x RDM4.65FIXEDSEVERNE 430RDM or SDMEnigma 160Triple X
7.046120274 x SDM5.15FIXEDSEVERNE 430SDMEnigma 180RACE C
7.848821074 x SDM5.45FIXEDSEVERNE 460SDMEnigma 190RACE C
8.651822274 x SDM5.75FIXEDSEVERNE 490SDMEnigma 210RACE C
9.451824074 x SDM6.00FIXEDSEVERNE 490SDMEnigma 210RACE C

TECHNOLOGY

Severne Mach4 2021 - racing
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SEAMLESS HEAD PANEL

This high abrasion area is made from only 1 panel and does not carry any exposed seams, preventing any potential weak point in this area. As a result, seam creep and seam-related failure have been eliminated.

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LEADING EDGE

Tuned entry with a finer leading edge rotation for reduced drag.

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OPTIMIZED AERODYNAMICS

By aligning the battens with the direction of airflow drag has been reduced. Clean panels with minimal seams further improve the aerodynamics.

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DIRECT DRIVE TENSIONERS

DIRECT DRIVE TENSIONERS

The DDT 4 and DDT 5 tensioners directly connect the tube batten to the leech of the sail. This new design eliminates the heavy section of tube that is needed for the standard batten tensioner and being smaller, has superior aerodynamics. It is used on all lower tension battens in the OVERDRIVE M4 and the MACH 4.

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INCREASED MID-LEECH TWIST

The mid leech has been opened more to decrease drag. Fast and slippery.

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OPTIONAL CLEW POSITIONS

OPTIONAL CLEW POSITIONS

POSITION 1:

This is the recommended setting and carries the adjustable outhaul fitting. It creates the perfect balance between a comfortable clew height and leech tension. This is the setting that Matteo Iachino will use for 99% of PWA slalom races.

POSITION 2:

This setting is lower and further in. It softens the feel of the sail and may be more comfortable for smaller, lighter riders looking for more control in higher winds.

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PERFORMANCE MONOFILM CONSTRUCTION

Monofilm Construction to maximise performance and minimize weight. Construction mimics the exact sail prototypes that were tested by our racers.

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BOOM HEIGHT REFERENCE

Boom height gauge for ease of reference.

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HIGH VISIBILITY SLEEVE

Keep your opponents and surroundings in check while racing.

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APEX SKIN TENSION

Capitalizing on the performance and proven durability of the Apex Pro mast, more luff curve has increased skin tension to lock the profile low and forward where it can be most easily controlled.

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3&4 ROLLER TACK PULLEY

Roller tack pulleys are matched to the sails downhaul requirements and aligned for friction free downhauling and threading ease. Rig your sails with the Severne Hardware Division extensions for function and simplicity.

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XL PERFORMANCE

XL PERFORMANCE

Used on the MACH 2, the XL Cam maximizes leading edge stability by allowing increased cam pressure to be distributed over a wider surface area.
Rotation is improved by the increased the leverage of the longer cam.
Mast wear is reduced due to less friction from the 8 rollers.

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AUTO-ADJUST FOOT

Previously we focused on drag reduction in the upper parts of the sail, but with the Mach 4 and OverDrive M4 even the foot sections have been analysed and refined. Less tension on the foot edge combined with more forward oriented shaping allows the foot to twist and auto-adjust.

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SPIDERFIBRE RACE

SPIDERFIBRE

SpiderFibre on the leech of the sail massively increases the perimeter strength and inhibits vertical stretch between the sail panels.

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ACCELERATED LEECH

Automating the dynamic twist has enabled us to remove the Reflex system. The lower leech twist is now pre-loaded to mimic the twist pattern induced by the Reflex batten under load. Significant advantages are simpler tuning, reduced weight, and increased durability.

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SEAMLESS FOOT CONSTRUCTION

A single panel in the foot area with hidden load patches and zero exposed stitching eliminates seam abrasion and seam creep in this high load area. Maximum durability and minimum weight.

PAIR IT WITH

ENIGMA _CARBON BOOM

APEX PRO _PRO RACE MAST

RACE EXTENSION CARBON _SDM PERFORMANCE

BASE _DURABILITY & FUNCTION

SEVERNE RACING TEAM

#TEAMSEVERNE

MATTEO IACHINO

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BJORN DUNKERBECK

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GONZALO COSTA HOEVEL

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ODA JOHANNE

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SEBASTIAN KÖRDEL

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MATEUS ISAAC

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GUNNAR ASMUSSEN

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AMADO VRIESWIJK

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Can I use the Mach 4 for foiling?

Yes, the new Mach 4 range has been designed to work on both fin and foil.

Which Mach 4 sizes rig on RDM MASTS?

Sizes 6,2 and down are set up for rigging on an RDM mast and have been tested using RDM masts.

It is, however, possible to rig sizes from 6,2 and down on an SDM mast by replacing the RDM cambers with Severne SDM black cambers and adding spacers.

Sizes 7,0 and up only rig on SDM mast.

How much downhaul should I use on the Mach 4?

Follow the recommended settings and work your way from there.

What is the difference between Mach 4 and HyperGlide 4?

The Mach 4 is a slalom sail that is compatible with the foil. The HyperGlide 4 is a foil specific slalom sail.