Hi there,

watching all kind of video reviews of the wings, the bloggers mention the potential of the wing at low end with lower inflation pressure.
However, I was not able to find any manual on how the pressure reduction of the wing affects the characteristics at low/high wind conditions.

In my particular case, I can inflate the strut (8PSI) and LE (8PSI) separately. While I assume any pressure above the max recommended value is not allowed:
- When should I go with the lower PSI for the strut, if at all?
- When should I go with the lower PSI for the LE?

p.s. my 3 pumps show all inaccurate values, so the same pressure can be 7+, 8 and 8+ on all three pumps. What is the tolerance the manufacturer would "accept"?

Best
Sasha

Armie says his XPS wings are better low end with less pressure in strut as bags out canopy a bit. Works on F-One V3 too and maybe other wings with tight canopies.

I can only talked about F-one, they recommend to deflate from 1 to 2 psi for more power. However I'M NOT convinced.I think the Strike V3 is a very effective wing but technically it needs a different pumping technic vs the older version where it's a big slower scooping action. The wing is stiffer from everywhere vs V2. So a lot did not adjusted to that way of pumping..faster shorter pace and the zone in where you can pump the wing is reduced...you have to find that power zone and work in it. The wing doesn't take much time to reload and it makes it get up on foil faster vs big old scooping method.So now...why deflate the main strut and the leading edge in low wind? I'm not sure, it makes everything less rigid and it doesn't make you leading edge bigger and it doesn't give you a bigger camber in the wing?

CLX said

p.s. my 3 pumps show all inaccurate values, so the same pressure can be 7+, 8 and 8+ on all three pumps. What is the tolerance the manufacturer would "accept"?

Best
Sasha

I replaced the pump gauge with digital 0-15 psi which has been very accurate. Most pumps I tested were off more 2 psi

hilly said..
Under inflated wings are horrible to ride. Always pump mine up as hard as I can with duotone pump. Says 8 psi but that is debatable
They feel way better hard. Insert sad old sexist joke here
Pump up onto foil better, handle gusts better, point better, etc.

I do the same, always a bit more than the recommended.

I tried a mates 4.5 Dlab Unit at 5 PSI instead of the recommended 8. Terrible idea.

I also have an electric gauge (same one pictured, but mine is rigged differently). The problem is that depending on the valve, the pressure can spike then fall, which limits the accuracy. I wish all valves would hold the pressure, rather than spiking and releasing.

to clarify, this is a valve issue, not a guage issue.

Thanks, so it seems for me I should reduce the pressure to nominal 7PSI on my Naish to have less power and so more reaction time to the gusts.. yep, less powerful, but at least not blasting me away from the board with every gust

I can't stand the feeling of an under inflated wing, even if it's just slightly soft. Getting better at pumping a properly inflated wing IMO is more effective. If I get up a 1/2 knot earlier with a soft wing, I'm irritated feeling the flex for the rest of the session. Maybe lighter riders can get away with it more easily.

I tried to ride underinflated wing. It pumps well. I had no problems getting on the foil. It rides ok. But I was not able to go upwind how hard I tried.