I would like to put two draft stripes on our C-22 mainsail. What are the correct locations for them? Thanks Dale
- Status
Draft Stripes
I don't think there's one right way, but you might take a look at the main on our 28.5 and see how the draft stripes relate to the batten locations. Check out Celebration II in www.huntertwentyeightfive.com ; GALLERY; Mainsail.
I don't think there's one right way, but you might take a look at the main on our 28.5 and see how the draft stripes relate to the batten locations. Check out Celebration II in www.huntertwentyeightfive.com ; GALLERY; Mainsail.
can someone tell me the purpose of the mainsail draft stripe?
I guess I am trying to figure out how to utilize one in determining sail shape, We have a new to us beneteau coming with in mast main, and I did notice some stripes on the main and the jib when we bought the boat. Txs
I guess I am trying to figure out how to utilize one in determining sail shape, We have a new to us beneteau coming with in mast main, and I did notice some stripes on the main and the jib when we bought the boat. Txs
Draft Stripes
Generaly the here are two draft stripes; maybe three with a larger boat and taller mast. You would want enough wind pressure in the sail to show it's true curve, say at 10 degrees of heel. For most situations in moderate wind the draft stripe should look like an airfoil or wing shaped curve with the deepest point of the curve about 40% back from the mast and the draft stripe should run almost straight back to the leech without 'hooking' back in. As wind speed increases and you want to de-power the main, you can start adjusting your outhaul, backstay adjuster (if you have one)to flatten the main then halyard tension and cunningham (if you have one) to adjust the max draft around 45% back from the mast if beating. In the highest wind range before reefing, the mainsail's draft stripe should be almost flat with minimum 'belly'. Genoa trim can benefit from draft stripes as well but the halyard tension is the means of adjusting the fore and aft point of max draft There's a lot more detail to sail trim and various sail controls, but the draft stripes are a way to see what those controls have done for your sail shape along with the tell tales to indicate how well the air flow over the sails is working for you.
Generaly the here are two draft stripes; maybe three with a larger boat and taller mast. You would want enough wind pressure in the sail to show it's true curve, say at 10 degrees of heel. For most situations in moderate wind the draft stripe should look like an airfoil or wing shaped curve with the deepest point of the curve about 40% back from the mast and the draft stripe should run almost straight back to the leech without 'hooking' back in. As wind speed increases and you want to de-power the main, you can start adjusting your outhaul, backstay adjuster (if you have one)to flatten the main then halyard tension and cunningham (if you have one) to adjust the max draft around 45% back from the mast if beating. In the highest wind range before reefing, the mainsail's draft stripe should be almost flat with minimum 'belly'. Genoa trim can benefit from draft stripes as well but the halyard tension is the means of adjusting the fore and aft point of max draft There's a lot more detail to sail trim and various sail controls, but the draft stripes are a way to see what those controls have done for your sail shape along with the tell tales to indicate how well the air flow over the sails is working for you.
Draft Stripes
Lynn1120: S. Sauer is right in that there is a a lot to sail trim control. The good news is that sail trim is very easy to learn but you have to start at the beginning and draft stripes are not the beginning. The mistake a lot of beginner to intermediate sailors make is they start in the middle of sail trim and they end up being confused. In other words, I could describe draft depth and draft position to you but what would you do with it? Here's where you have to start. There are 4 element to sail trim and they are draft depth, draft position, twist and angle of attack. ALL,AND I MEAN ALL, the controls for the main and jib are adjusting those 4 items and only those items so the first thing you have to do is completely understand those 4 items. If you don't, sail trim will never make any sense to you. The next thing you have to know is which sail trim controls for the main and jib are used to adjust the 4 element and which way to push or pull them to get the effect you desire. The "effect you desire" depends on your point of sail and wind condition. There is a particular setting for each point of sail and wind condition and you have to know what it is or you'll never get 100% efficiency out of your sails. I'll bet there are a number of sailors out there that could not tell me which controls for the main and jib are used to adjust the 4 element of sail trim. They have not mastered step 2 and it will be very difficult for them to advance from a sail trim standpoint. I know that sounds like a lot of stuff to understand but it really is very simple when presented in a logical manner. Once you have an understanding of the above, you've arrived. It is like riding a bike. There is only so much to learn and that is it.
Lynn1120: S. Sauer is right in that there is a a lot to sail trim control. The good news is that sail trim is very easy to learn but you have to start at the beginning and draft stripes are not the beginning. The mistake a lot of beginner to intermediate sailors make is they start in the middle of sail trim and they end up being confused. In other words, I could describe draft depth and draft position to you but what would you do with it? Here's where you have to start. There are 4 element to sail trim and they are draft depth, draft position, twist and angle of attack. ALL,AND I MEAN ALL, the controls for the main and jib are adjusting those 4 items and only those items so the first thing you have to do is completely understand those 4 items. If you don't, sail trim will never make any sense to you. The next thing you have to know is which sail trim controls for the main and jib are used to adjust the 4 element and which way to push or pull them to get the effect you desire. The "effect you desire" depends on your point of sail and wind condition. There is a particular setting for each point of sail and wind condition and you have to know what it is or you'll never get 100% efficiency out of your sails. I'll bet there are a number of sailors out there that could not tell me which controls for the main and jib are used to adjust the 4 element of sail trim. They have not mastered step 2 and it will be very difficult for them to advance from a sail trim standpoint. I know that sounds like a lot of stuff to understand but it really is very simple when presented in a logical manner. Once you have an understanding of the above, you've arrived. It is like riding a bike. There is only so much to learn and that is it.
- Status