tcm
...
ok. Not tried it yet anyway, let alone chopped it free...
Sea Anchor
- Thread starter emnick
- Start date
tri39
Well-Known Member
I have made a drogue out of a tyre which is towed sideways. I fitted 3 large U bolts to the side walls and led 3 short lengths of chain to a large swivel. Also a fitted a circular ply baffle with a central hole on the trailing side. Would be towed by the ground tackle if nec. So far I've always found that with a storm jib only we don't surf fast enough to use it!!
The one time it was necessary (just south of St Catherines on the IOW in '77!) it was not yet built!! One day I'll test it.
I'll photograph it in May.
I do carry a commercial para anchor as well, "just in case".
The one time it was necessary (just south of St Catherines on the IOW in '77!) it was not yet built!! One day I'll test it.
I'll photograph it in May.
I do carry a commercial para anchor as well, "just in case".
beneteau_305_553
Well-Known Member
I used a para anchor for 24 hrs while on a passage to Bermuda and it ended up as a shredded mass on the end of the line . It was really good till it blew out but even then was still good to just slow down the boat . It was a 6ft dia and deployed fronm the stern of my 6 ton 34 footer.
I have now a builders bag and use two lines about 20 m long, one to each stern quarter. Havn't used it for real yet, only for testing in conditions up to F6 so far where it worked well. Maybe the twin lines stop it twisting. Towing a ton of water does slow you down!
I always rig it from the stern to avoid being broadside which in my opinion is the crutial point. The turbulence from the bag knocks off the cresting waves and reduces the seastate conciderably.
Deploying from the bow is fine till it gets really bad then the boat does drift backwards fast enough for the boat to turn side on. Not good.
I have now a builders bag and use two lines about 20 m long, one to each stern quarter. Havn't used it for real yet, only for testing in conditions up to F6 so far where it worked well. Maybe the twin lines stop it twisting. Towing a ton of water does slow you down!
I always rig it from the stern to avoid being broadside which in my opinion is the crutial point. The turbulence from the bag knocks off the cresting waves and reduces the seastate conciderably.
Deploying from the bow is fine till it gets really bad then the boat does drift backwards fast enough for the boat to turn side on. Not good.
damo
Well-Known Member
There seems to be a fortunate side effect from using a series drogue, which appears in several accounts, of the tumbling wave stopping its breaking over the line of the drogue. One theory is that the weighted line is taking energy from the counter-rotation of the wave cell towards the base of the wave, so reducing the tendency to break at the crest. This reported effect was another plus factor in deciding which system I was going to get, although my understanding is that most types of drogue/sea anchor create a "slick" effect
(90 drogue-ettes spliced on over the last couple of afternoons. 17 to go /forums/images/graemlins/grin.gif)
(90 drogue-ettes spliced on over the last couple of afternoons. 17 to go /forums/images/graemlins/grin.gif)
webcraft
Well-Known Member
[ QUOTE ]
(90 drogue-ettes spliced on over the last couple of afternoons. 17 to go )
[/ QUOTE ]
What made you decide on 107 drogues? Seems a bit light for the Warrior, we have 90 for an Albin Vega which probably weighs 4 tons in long distance cruising trim.
Here's a pic of Kathy splicing ours in Madeira three years ago. Never used it in anger, but it is reassuring to have on board.
- W
(90 drogue-ettes spliced on over the last couple of afternoons. 17 to go )
[/ QUOTE ]
What made you decide on 107 drogues? Seems a bit light for the Warrior, we have 90 for an Albin Vega which probably weighs 4 tons in long distance cruising trim.
Here's a pic of Kathy splicing ours in Madeira three years ago. Never used it in anger, but it is reassuring to have on board.
- W
mandlmaunder
Well-Known Member
Hi
We have a 36f cat and a 15ft Paranchor, have yet to deploy the Para even in rough (25ft waves) as Heaving To worked well enough for us not to have any need to be running around on deck with hundreds of ft of line and shackles n stuff.
Although I am happy that it is on board I cant now imagine having the time to drop it over the side when just backing the head sail and dropping the main has been proven to work for us.
We have a 36f cat and a 15ft Paranchor, have yet to deploy the Para even in rough (25ft waves) as Heaving To worked well enough for us not to have any need to be running around on deck with hundreds of ft of line and shackles n stuff.
Although I am happy that it is on board I cant now imagine having the time to drop it over the side when just backing the head sail and dropping the main has been proven to work for us.
damo
Well-Known Member
[ QUOTE ]
What made you decide on 107 drogues?
[/ QUOTE ]
The boat is in the 15000lb/6.8t category, so the recommendation is 107 cones. The next band up is for 9t (116 cones), which is a lot more than my all-up weight, but I've got 3 spare so I'll probably splice them on as well /forums/images/graemlins/smile.gif
What made you decide on 107 drogues?
[/ QUOTE ]
The boat is in the 15000lb/6.8t category, so the recommendation is 107 cones. The next band up is for 9t (116 cones), which is a lot more than my all-up weight, but I've got 3 spare so I'll probably splice them on as well /forums/images/graemlins/smile.gif
TigaWave
Well-Known Member
I've been in situations twice that required storm jib only in open ocean sized breaking seas, 10m regular sell pattern with occassional 15+m breaking.
We succesfully without damage or too much disconfort hove to for two nights in one storm making 2-3 knots, and in another 4 days to the Azores broad reached with storm sail trailing warps as going up the back of waves as they pass we needed something to keep the stern from swinging or broaching when surfing.
All I can say is this worked well for a 40' 3.9m beam 8000kg boat fin keel.
since these incidents I havn't felt th eneed for a sea anchor or drogiue.
We succesfully without damage or too much disconfort hove to for two nights in one storm making 2-3 knots, and in another 4 days to the Azores broad reached with storm sail trailing warps as going up the back of waves as they pass we needed something to keep the stern from swinging or broaching when surfing.
All I can say is this worked well for a 40' 3.9m beam 8000kg boat fin keel.
since these incidents I havn't felt th eneed for a sea anchor or drogiue.
Pete7
Well-Known Member
W, what length of drogue is a 107? reason being we have just ordered a mast climbing ladder from Hurst Marine and wonder if this would do instead.
http://www.hurst-marine.co.uk/
Pete
http://www.hurst-marine.co.uk/
Pete
damo
Well-Known Member
[ QUOTE ]
what length of drogue is a 107
[/ QUOTE ]
Try this link /forums/images/graemlins/smile.gif
If your mast is about 90m tall the mast ladder might be sufficient /forums/images/graemlins/tongue.gif
Seriously though, one of the principles behind sea anchors and drogues is that they should be a couple of wavelengths long, so that there is always drag in a different wave to the boat. There is no point in having a short series drogue because it is the cumulative drag and elasticity that provides the gentle action it is designed for. The line is also "tapered", with the later sections of smaller diameter. There seems to have been a fair amount of maths involved in the development /forums/images/graemlins/smile.gif
what length of drogue is a 107
[/ QUOTE ]
Try this link /forums/images/graemlins/smile.gif
If your mast is about 90m tall the mast ladder might be sufficient /forums/images/graemlins/tongue.gif
Seriously though, one of the principles behind sea anchors and drogues is that they should be a couple of wavelengths long, so that there is always drag in a different wave to the boat. There is no point in having a short series drogue because it is the cumulative drag and elasticity that provides the gentle action it is designed for. The line is also "tapered", with the later sections of smaller diameter. There seems to have been a fair amount of maths involved in the development /forums/images/graemlins/smile.gif
