Clew holes

My Sailworks sails have 2 hole height options for the outhaul..someone told me one works for power & the other control but I've forgotten which is which?

Thanks! Makes sense..I used to think they were just there to accommodate different height sailors..

My vetinarian uncle advised when I was a spotty youth

If its the right way up use top hole

If its face down use lower hole

i use lower as im quite short and it feels wierd when the boom head is higher than the tail

Sue easy to remember.
High winds, use low clew hole.
Low winds, use high clew hole.
So its high wind, go low. And low wind, go high.

I agree with Mark ^. In a fully battened sail with a clew eye separation of around 100mm, which seems to be the norm, I reckon the difference in sail shape between the two would be absolutely minimal. You would however notice the boom angle difference, which personally I believe is the main reason for it.

Then you probably do want to use the lower hole........ unless you are using a softer mast or a mast with more tip flex (both of which already create more twist)

somewhere i read Bruce Peterson's discussion on the two(2) clew holes
and there are the two(2) reasons

1) height of the person - higher hole for taller people
2) power and the opening of the leech

is it a gimmick ?
donut think this so cuz a "shorter" w/s buddy tried the top hole in light winds and just found it too uncomfortable

so, it works for him - it terms of position AND with open leech NOT too much pull from the top o the sail ...

Or...lower hole for Duck Gybes - makes them easier to learn and essential with bigger sails to avoid getting slapped across the face by the foot of the sail - not pleasant.

Thanks! Glad I asked. I actually had to write it down to make sense of it all.. I've made a note to stick in my gear as I'm sure by the time I use that sail again I'll have forgotten!