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Old 03 December 2008, 18:12   #1
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both engines dow



!!!
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Old 04 December 2008, 05:50   #2
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Very intersting and useful, certainly got me thinking as well.

Just ordered a drogue off ebay
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Old 04 December 2008, 06:14   #3
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I've never seen drogue's used and I could see exactly what they where doing in the link. I don't mind putting the dunce hat on and asking what they do?
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Old 04 December 2008, 06:27   #4
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I've never seen drogue's used and I could see exactly what they where doing in the link. I don't mind putting the dunce hat on and asking what they do?
i imagine they could prevent the craft from broaching but only if the drogue had been at the limit of its tether. In the case of this boat i'd imagine they just dropped it over the side and it took awhile for it to have any effect.

why do you think both engines stalled and then only one restarted?
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Old 04 December 2008, 06:38   #5
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Looked to me like both engines went under.

Thanks lewy, so does a drogue course drag or something?
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Old 04 December 2008, 06:53   #6
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Looked to me like both engines went under.

Thanks lewy, so does a drogue course drag or something?
it works like a parachute for the water but with a smaller hole to allow water to pass through it. it enables the boat to more or less keep its heading into the on coming waves when tethered to the bow. its often used on the stern aswell. i know yotties use them quite alot!!
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Old 04 December 2008, 08:49   #7
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Also known as a sea anchor but some people would argue that they are different things.

When you are in the mille of the Ocean and water depths are 12,000' it's a bit difficult to anchor. By using a large parachute type device you get the same effect as being at anchor although you will still drift slightly. If you engines have died it will hold you into the wind and waves so the bow can ride the waves. You need a very long rope for this to prevent the anchor coming out of the waves.

A drogue is pretty much the same thing but smaller. You use it at the stern to prevent surfing down waves and the boat broaching.

I carry one as they roll up so small.
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Old 04 December 2008, 08:58   #8
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Looking at this brilliant video though it makes me wonder

Did they use a drogue or sea anchor?

I doubt it somehow. A situation like that is NOT the place to use one. If you are in danger of being swept onto the shore in shallow water you use an anchor - a proper one!!!

ILBs are rigged for very fast anchor deployment and have a big winch in front of the console to get it back in again.
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Old 04 December 2008, 09:44   #9
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you can see when the drogue properly works 1:46 secs into the film. prior to that i guess they were paying out the warp and then they got hit by a wave that probably swamped the boat but took them the correct distance from the drogue.
what length of tether do you have on your one codders?
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Old 04 December 2008, 10:19   #10
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A "Sea Anchor" is a great bit of kit in situations like this connected to the bow, by personal experience I found that a "Sea Anchor" recommended for a 30ft Yacht is not suitable for a 5.5m - 6.5m RIB, I now use one recommended for a 50ft yacht with 5 x the boats length of warp.

It could also be used as "Drogue" with a displacement boat or semi displacement boat being towed from the stern with a 2nd line (tripping line) in a following sea to stop the boat broaching.

Jono
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