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Old 04-25-2009, 02:58 AM   #1
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If you are caught in bad weather on a multi-hull are the options the same as in a mono-hull? If you decide to set a drogue and heave to on a multi-hull is it basically the same as in a mono-hull with drogue off of the bow of one of the hulls?
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Old 04-25-2009, 03:57 AM   #2
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Hello there,

This subject was covered in a previous topic in this forum :- Click HERE

Richard
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Old 04-25-2009, 12:56 PM   #3
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Just one more comment on this thread. *I do not believe that I would ever want to lie ahull, in either a monohull or a multihull. *Except for pitchpoling, rolling in either type of boat is going to be the hardest punishment a boat can take, and is most likely when lying ahull.
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Old 04-25-2009, 03:29 PM   #4
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Thanks for the reference to the past article. It made it clear that a drogue can save your life. The skipper that had done this ran the drogue off of the transom and suffered damage when a big one hit the sliding glass door into the saloon. What do people think of putting the drogue at a 45 degree angle off of one of the bows? That of course is what people in monohulls should do.
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Old 04-25-2009, 11:32 PM   #5
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I think that you are confusing a sea anchor and a drogue. A sea anchor is usually streamed off the bow to hold the boat bow to the wind and stopped. There are many arguments for a sea anchor, but no boat is going to be stopped completely, and falling backwards in the kind of seas that would exist when this strategy is deployed is liable to damage the rudder as it is slammed to one side or the other.

A drogue enables the boat to keep moving, running downwind in controlled conditions where the boat can't fall off a wave or surf down the face of a wave so rapidly that it pitchpoles or broaches. A drogue is expected to slow the boat to about 3 knots or so, regardless of its hull speed.

A wave that has such force and incurs such damage to a boat running before the waves will be even more damaging to a boat held fast by a sea anchor with the full momentum of wind and waves pounding the boat.

There are instances when a sea anchor is more appropriate, such as when you are approaching a lee shore, you don't want to be driven down on it by trailing a drogue. Or, the crew is just so exhausted that stopping the boat just to give the crew a rest is the prudent option. However, given enough sea room, I would prefer to run before the wind trailing a series drogue than to lie off a sea anchor taking the full force of wind and waves.
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Old 04-25-2009, 11:52 PM   #6
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Quote:
Originally Posted by terryorze View Post
Thanks for the reference to the past article. It made it clear that a drogue can save your life. The skipper that had done this ran the drogue off of the transom and suffered damage when a big one hit the sliding glass door into the saloon. What do people think of putting the drogue at a 45 degree angle off of one of the bows? That of course is what people in monohulls should do.
Reading the Delivery Skipper's post again -- the method used was a nylon warp - each end tied to a transom and a length of chain slid down the warp to keep the warp from lifting out of the water.

No drogue deployed.

Not sure about "putting the drogue at a 45 degree angle off one of the bows" It is most likely to swing the boat through 180 degrees into the wind and following seas - in very short time, with no guarantee that the line and/or drogue will not foul a rudder or propeller - If the exercise was successful however, then what? The catamaran is now no longer sailing, no control over steerage, certainly slowed down (not by much) but being pounded by the seas and wind. Assuming the drogue was attached to the port bow - then once the boat was facing the storm winds and seas, the boat would be pulled by the drogue to an angle so that the seas would now hit the port sides of both hulls resulting in the boat alternately straightening up and then returning its port aspects to the elements.
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Old 04-27-2009, 04:21 AM   #7
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You were correct, I was confusing a drogue and a sea anchor. After checking the terms I appreciate you telling me how they would be used differently in different situations. I have never gotten into a situation that extreme on any craft smaller than the waves. Rode out a few Hurricanes on a destroyer. This is important advice. Jack and Larry Pardee would disagree with you about heaving to with a sea anchor, them thinking it the best way to go. Clearly nobody really knows whether running before or being hove to is the best strategy, but I would certainly feel more in control with a drogue running, and once you have chosen that tactic it would be very dangerous to come about and choose a sea anchor unless as you say you are running out of ocean. That happened on a destoyer and it was not fun to try to time the waves a we came about before crashing into Spain.

No doubt following seas are more comfortorable in anybody's mind.

So my plan will be to check the charts for running room. If there is enough room to run deploy a drogue and run or if there is not one a weighted warp. Faced with a Lee shore a sea anchor in a harness deployed so that it puts the boat in hove to position.

Thanks again.
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