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Heaving-To

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samuel View Drop Down
Admiral of the Fleet
Admiral of the Fleet


Joined: 26 December 2004
Location: United Kingdom
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Post Options Post Options   Thanks (0) Thanks(0)   Quote samuel Quote  Post ReplyReply Direct Link To This Post Posted: 15 July 2019 at 07:04
Konstantin
Forgive my confusion but if you only have the main up & the boat would want to luff into the wind, would it not. It would then stall & fall away again. During this time the sail would flog.
Surely in heavy weather that would be a simple way to ruin a laminate sail (which i have) or any sail for that matter, in a short time.
As for "stern to the waves" that suggests to me ( If i understand it correctly)that you would be running before the wind & the sail would be constantly full. If i did that the boat would be off like a scalded cat (Sorry Johan, if you are reading this, do not let you favourite pet read that, Cry)  & want to round up into the wind.
Can you please explain how you can go stern to the waves & still not fill the mainsail.

I also have a problem, that larger boats possibly do not have, that I have the Raymarine AV 100 autopilot. When this gets into " stalling" it will turn off & stop working. Sometimes it will go hard over, which it did recently in 20kts causing a sudden gybe. As a result I cannot use it if the boat is not moving forward & steering a course. I have to either lash the helm, or use my Aeries self steering. I expect larger boats have much better autopilots & can let the autopilot hold the boat in a hove too state . Not a good situation because it relies on mechanics, rather than boat balance, but better than nothing.


Edited by samuel - 15 July 2019 at 07:08
Daydream Believer- Hanse 311- No GBR9917T- Bradwell Essex
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Konstantin View Drop Down
Captain
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Joined: 24 August 2014
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Konstantin Quote  Post ReplyReply Direct Link To This Post Posted: 15 July 2019 at 07:40
Samuel, while trying to reduce the jib area so the boat would sit sharper than 90 deg to the waves I found that at fully furled position the area of the furled sail still keeps the boat 60 deg to the waves. It surely depends on how much sail area you have aft - I have my bimini and sprayhood down, I barely have anything at all aft of the wheels etc. With some substantial items aft you would need more jib area. With furled jib and rudder hard over she stayed very steady 60 deg to the waves, but still moving forward. And my goal was to create a sleek. So with just some of my furling main out to port, and rudder hard over to starboard, when the boat tries to sail into the wind the main stops working (becomes parallel to the wind, as the rudder turns the boat to starboard when she tries to sail) but the sail area of the bow and furled main pushes the bow back downwind. When the main kicks in and she tries to sail into the wind again. And this all stays in equilibrium, with the boat moving 60 deg sideways downwind, at about 1,5 knots, creating nice sleek upwind by sideways rudder, keel and some hull in the water moving sideways. And this turbulent sleek kills the approaching waves. So apart from structural concerns - rudder sideways to the waves (but there aren't any now) and the elements blowing into the cockpit, I don't see much problems with stern-to heaving-to. I'll try to find a picture I took that day and will post it here.
I did not use autohelm to hold the rudder hard over - just used the brakes on the wheels (would use some ropes in heavier weather).

Edited by Konstantin - 15 July 2019 at 07:46
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