Heavyweight (90kg+) takeoff strategies & mast stiffness: Carbon vs High-Modulus

Posted by Fredy (Gorge Rider) on 2024-08-01

For riders over 90kg (200 lbs), standard standard-modulus carbon or aluminium masts often show noticeable lateral twist when pumping hard in light winds (sub-14 knots). This torsional flex bleeds away critical lift energy before the foil can break free.

Key observations from 2 seasons at 96kg: 1. Mast stiffness: Switching to a 19mm HM (High Modulus) carbon mast was night and day. Every ounce of leg drive directly loads the front wing rather than twisting the mast. 2. Board volume: Sizing board volume to rider weight (kg) + 20 to 25 liters ensures comfortable kneeling balance in zero-wind lulls. 3. Front wing surface: A 1300–1600 cm² mid-high aspect wing with good camber gives immediate low-speed lift without creating uncontrollable drag at top speed.

What are fellow heavyweight riders using to plane early and keep carving smooth without mast deflection?

Replies

Joe Foiler

Also check your fuselage connection bolts. At 90kg+, loose fuselage screws or soft shims cause micro-play that feels just like mast flex.

Konstantin

I weigh 93kg and experienced the exact same thing on my old 16mm mast. Upgrading to a dedicated 19mm HM carbon mast eliminated the "mushy" feel when pumping up onto foil.

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