Foil wrote: ↑
Wed Feb 27, 2019 7:45 am
just to help anyone who has not yet started to do the de-grease routine before a session,
all i would say is just try it,
it's a major tip i picked up from the pros who sail at flag beach, mainly the flysurfer team race tech guy who i have now met for the last 2 seasons over there, he looks after the carbon race foils for the guys,and has passed on some tips to hep prevent unwelcome vibration,or that unstable underfoot feeling you can experience when pushing for maximum speed or performance from your mast and wingset.
I ignored this advice during my first year foiling as i thought that's only for the speed/race guys, but as i got better and was trying to push my foils to go faster i noticed the foils at times were feeling just not right when either pushing hard upwind-letting go- cavitating, or developing a very nervous feeling at speed which if i pushed for more speed resulted in a crash, a very sudden feeling of letting go of all grip then boom!
so i remembered what i was shown at flag beach,
i ran plain tap water slowly across the top surface of all my carbon bits, mast and wings, and watched as the dribbles of water ran down over the surfaces, you should not see any water running down the surface that deviates from the straight down position,
any water that runs off the vertical drop line has hit the invisible destroyer of foil control--
grease/oil/sun cream/skin oil from simply placing your hands on the foil surfaces when carrying /bolt grease residue/outboard motor oil residue/shipping oil residue, all invisible most of the time, but all can cause cavitation as water avoids sticking to any surface that has been contaminated, resulting in loss of grip when any sort of pressure is applied when sailing, this can happen at alarmingly low speeds of under 20kmph but certainly over that threshold.
The simple solution is to wipe all your surfaces with a soapy microfibre cloth before you hit the water,
and it works, another experienced foiler at flag tried the same routine and could not get over the difference it made, his words were-- "so smooth"
"none of that shimmying sort of feeling, no letting go like you have hit some seaweed,why did I not know this before?"
its simple yet so effective.