When sailing in steep seas the problems with my jibsheet are increasing. It loosens very often when hitting a wave.

I checked everything onshore and all is working pico bello. I even cannot force the same problem to happen in a simulation.

Does anybody once had the same problem????????????
see for twice occasions: http://www.youtube.com/watch?v=UGhOfJl67VY

For obvious reasons I led already the jibsheet above wishbone.

my guess is the net tramp...mesh tramp wouldn't allow that much water pressure to hit the lines and pull them free of the cleats...

That's what I thought at first too. But now I'm still in doubt.

Problem is that I sail single-handed and when encountering waves I have my focus not on the sheets.

I led my sheet already above the wishbone which makes it less sensitive for hits though the net. Besides that, you can see at the very end of the video that the sheet line from the wishbone to the camcleat is straight. So hitting the line with water will only move the line to go upwards.

And that's just the direction for fixing the sheet between the cams (it will unlock in downwards pull on the sheet).

I still don't know; you may be right afterall if there's nobody else with the same problem.

The last days I'm thinking of torsion of the hulls which will loosen the sheet on the sailside maybe a very short moment. And so make a free-ing more possible???????????

Have you ever capsized out there? They are some pretty challenging conditions to be sailing in on your own.

Once,(when I was young, 25 years ago), capsizing was for me a normal thing to happen each time I was sailing on the sea. My speciality was total turtle, upside down, far from the coast.

But now I'm 65 and fearfully try to avoid each capsizing!!

I´m not sure if you can see on my videos the special pole which I take with me. It´s bounded against the front beam and can easely be disconnected.

It´s like a fork at the end and one side is put against the backside corner of the frontbeam (which is standing up when capsized) and the other side is connected to the uphaulline.

So the principle is to have more leverage when righting.

By the way, I use the pole also for righting and letting down the mast on the beach. (I have to do that each time)

What type of line is it and how old is the line?

many lines are impregnated with graphite or other and are very slippery when new

It's a very old line from the stone age. I think in the States is called dacron spun braid. So certainly it's not slippery.

But you brought me on an idea. I still have an old mainsheet with no core in it. I bought it a few years ago in the Catsailors store overhere (new england rope???). Forgot the name.

After one trial, I didn't use it anymore, because it had the tendency to get stuck between the cams of the cleat.
Because there is no core, which is "the meat" for the cams.

So, it happened that I could not loose my mainsheet on time when it was needed in a windblow.

But in this case with my jibsheet which loosens when I don't want it, it maybe the solution.

Have to try it.

good luck, let us know if it's the solution.

thanks, it may take a while though, because it happens only in demanding circumstances.

The sheet I'm trying now is indeed new england rope, I looked it up. Type BZZZ which has no core.

It keeps a riddle to me how they can advice just this type for sheets, because it really gets jammed between the camteeths.

Why don't you take your camera and point it at the cleats and "see" what happens?

Yes ofcourse that's a good advice. Problem is only that I don't have a fixed camara supportdevice. I'm more or less forced to use a helmet camera.

My cat is 15 ft. and 2.5m large; the tramp surface is too small for having extra things in the way.

I have already trouble with my bag for food and drink and for the extra ropes with which I can pull my rudders down from the high-side.

Building a camara support on the side of the hulls is also not possible because of the waves in which I use to sail.

Especially the last impossibility hurts because only with such a camera position I should be able to film the incoming waves as I see them by myself.

don't know if MN3 is still watching this thread, but The New England rope with no core was indeed the solution. I've sailed now several times above 20 knots with swell in 40 degrees to the winddirection, so uneasy sea.
No breakouts on the jibsheet. Can recommend this solution.