Tuning Axis Spitfire for heavy chop: Mast track placement & shims
Posted by Fredy (Gorge Rider) on 2024-07-19
When riding in short-period chop (1.0–1.5m waves with 3–4 second periods), I often get unexpected breach sensations right as the board crests the chop.
My current setup: - Board: 85L Carbon (track placed in dead center) - Foil: AXIS Spitfire 840 + Skinny 360 rear - Rider Weight: 76 kg in 18-22 knots
I noticed shifting the mast 1.5 cm forward gives instant low-end lift, but at top carving speed the nose wants to climb uncontrollably. Shifting 1.5 cm back stabilized top speed, but required aggressive front-foot stomping to take off.
How are you tuning your tracks between flat water bays and rolling choppy river/ocean spots? Does a +0.5° tail shim solve the front-foot fatigue when the mast is shifted back?
Replies
Konstantin
Moving the mast back 1.5cm completely transformed my ride in steep chop.
Joe Foiler
Agree with Konstantin. Adding +0.5° shim also increases downforce on the tail, which calms down pitch reactivity so you can drive through chop with more confidence.
Fredy (Gorge Rider)
Tested this yesterday with 1cm back + 0.5° shim. Total game changer in 25 knot gorge conditions. Front foot pressure was super predictable!