Bosun Higgs
N/A
Depends a bit on what handicap you sail under. If it's a progressive PY system, save your energy as your handicap will adjust to the state oif your hull anyway
Smooth hull for racing?
- Thread starter moj779
- Start date
Depends a bit on what handicap you sail under. If it's a progressive PY system, save your energy as your handicap will adjust to the state oif your hull anyway
Clive
Well-Known Member
Hi
I beleive that a smooth bum is important, however you do need to fill any hollows and get your foils in good shape, ie nice shart squared off trailing edges etc.
Assuming that you will put antifouling on top of the epoxy I would give the hull acouple of coats of antifouling first, then wet & dry starting at say 120 and work down to 600, then final coat of antifouling using a smooth foam roller with someone laying off with a brush. Then final wet & dry for a fast finish. Tip when using Wet & Dry, use a garden hose to provent the paper from clogging up.
Happy racing.
I beleive that a smooth bum is important, however you do need to fill any hollows and get your foils in good shape, ie nice shart squared off trailing edges etc.
Assuming that you will put antifouling on top of the epoxy I would give the hull acouple of coats of antifouling first, then wet & dry starting at say 120 and work down to 600, then final coat of antifouling using a smooth foam roller with someone laying off with a brush. Then final wet & dry for a fast finish. Tip when using Wet & Dry, use a garden hose to provent the paper from clogging up.
Happy racing.
snooks
Well-Known Member
I think the race has finished, not to mention the season! This thread started over 2 years ago!
in Oct 2008
in Oct 2008
Bosun Higgs
N/A
Chap down at our local club spray paints his antifoul on and then flats it back
DownWest
Well-Known Member
Peter Scott used to race N 12s keenly. Before launching, he and his crew would apply a coating to the hull (egg whites) " Of course, it probably washed off in the first couple of minutes, but certainly depressed the opposition"
This would come under the ban on polymer coatings now, but the mind games were the same.
A
This would come under the ban on polymer coatings now, but the mind games were the same.
A
Sailfree
Well-Known Member
Surface finishes are a complex subject and my understanding is that artificial swim wear is banned now from competitions as it mimiced the rough sharkskin.
If smoothness cuts down friction why are golf balls dimpled for maximum drive distance. Orange peel might be best but only on a faired hull!!
If smoothness cuts down friction why are golf balls dimpled for maximum drive distance. Orange peel might be best but only on a faired hull!!
Quandary
Well-Known Member
Message to self, again, check the bloody dates of all the posts before wasting time.
Monique
Well-Known Member
I think the race has finished, not to mention the season! This thread started over 2 years ago!
in Oct 2008
I had noticed too... this thread has a beard!!!
Seajet
...
Despite age, someone must have rekindled it.
Speaking of boundary layer, golf balls and sharkskin, if you recall I think it was the 1989 America's Cup, the U.S. entry had a special hull coating applied in thin sheets, designed to reduce boundary layer drag by sharksin effect.
It was made by 3M, cost megabucks to develop, known as 'riblets', I've always wondered if it's just the rules and cost preventing more widespread use.
Of course this was not at all the same as having a rough hull, it was very precise.
Speaking of boundary layer, golf balls and sharkskin, if you recall I think it was the 1989 America's Cup, the U.S. entry had a special hull coating applied in thin sheets, designed to reduce boundary layer drag by sharksin effect.
It was made by 3M, cost megabucks to develop, known as 'riblets', I've always wondered if it's just the rules and cost preventing more widespread use.
Of course this was not at all the same as having a rough hull, it was very precise.