Sailing Downwind

c14_Jim

Sailing on Shelter Bay
#22
How much to ease the vang.

According to Steve Falk (a Sunfish and 470 champion) "in a small boat as the wind strength increases, the heeling forces on the boat become more than you can control by hiking or putting weight on the rail. Here you want to increase twist to reduce the forces on the upper portions of the sail." That is where you want to start easing the vang to allow the top of the sail to twist off to leeward. The bottom portion of the sail still drives and keeps the boat pointing, but without the big heeling moment caused by the upper part of the sail. So the answer, it seems to me, is that you ease it enough so the top of the sail falls off enough so that you can control the heel of the boat with you weight.
 

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Thread starter #23
I see now. I taught myself off of the internet and so I haven't really gotten the finer points of sailing down. Thank you very much, I am glad I still have more to learn.
 
#24
Also I seem to get too much flutter along the leech. I pull everything tight. The sails might be about 20 years old, is that likely the problem?
?
20 year old sails are likely blown out . Some sails have a small diameter control line sewn into the leech of the sail to help control that flutter.

Also on the jib: I step the mast, pin the forestay, raise the jib and then the forestay is loose, should I hoist the jib so that the tension is even between the jib's luff and forestay?
the jib luff tension should always be less than the forestay tension , you want the forestay carrying load of the rig not the sail.
Ease your jib halyard , if your getting excessive forestay slack , adjust by tightening the shrouds.

Good sailing !

Rob
 

c14_Jim

Sailing on Shelter Bay
#25
Thghtening the shrouds: how much?

Rob,
I'm struggling with tuning my shrouds. I have them a bit loose because I read somewhere that the mast on the C-14 (and mine is actually an Omega 14) should be able to move back and forward for best performance beating and running, respectively. So here is my question. Before you put the sail, or even the boom on the mast: Should the mast be able to move fore and aft, or should the tension on the headstay and shrouds be enough to hold it from moving?
 
#26
I have mine set-up to where you need a slight amount of pressure applied to the mast to to be able to insert the jibstay into the adjuster. on a close reach, in wind over 10 knots my leeward shroud slackens visibly.

Rob
 

c14_Jim

Sailing on Shelter Bay
#27
Back to square one.

Thanks Rob.
That was about how the boat was set up when I got it. I had loosened up the shrouds one notch on each side and it is so loose there are times I hear the mast clunk as it moves back and forth in light wind when the boat rocks. So I'm going to look at either tightening the adjuster on the forestay or shortening the shrouds back a notch. Should there be any rake in the mast without vang or mainsheet tension? check the rake on the international 14 in the picture! Jim M
 

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#28
Yeah rake and bend . look at all of that sail area !

Use rake to adjust the amount of weather helm, more rake = more weather helm . if you cant point you need more weather helm , if your rounding up you need less .

Be careful of a loose rig in rough condiitons, you want to avoid shock loads in your riigging.

Good sailing
Rob
 
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