Acquiring A Ready Made Series Drogue

[Dockhead]

Unless one of the crew volunteers to make it, there will not be time now for me to get together a series drogue, and so I am looking at store boughten ones.

This one is available in the UK, and for a somewhat reasonable price:

147, 156, 164 Monohull | Ocean Brake

But uses nylon??

I would have wanted dyneema or that new stuff Seaworthylass found, or at worst, polyester.

I am surprised that people are making them out of nylon.

Anyone have any better source?

[alctel]

Originally Posted by Dockhead

Unless one of the crew volunteers to make it, there will not be time now for me to get together a series drogue, and so I am looking at store boughten ones.

This one is available in the UK, and for a somewhat reasonable price:

147, 156, 164 Monohull | Ocean Brake

But uses nylon??

I would have wanted dyneema or that new stuff Seaworthylass found, or at worst, polyester.

I am surprised that people are making them out of nylon.

Anyone have any better source?

I just bought one of these - I think OceanBrakes cones are a lot heavier built than most other suppliers.

I could be wrong though.

You could also contact them and see if they would change materials

[Matt Johnson]

I'm sure they would welcome the chance to do it with dyneema. It's a lot easier to weave through the braid than nylon, so may mitigate the price difference in fiber. Our nylon weaved 114 cone drogue is way larger to store than I'd like, but I bought it used and can't be too picky.


Matt

[Dockhead]

OK, I'll write to them.

I wasn't even thinking about the storage issue, which is a significant question.

[Dockhead]

Maybe it's worthwhile just buying the cones? Sewing up the cones with a sewing machine is not going to be very practical for underway, but I believe the cones, once made, are attached by hand, so something we could do all together during the trip up. There is no significant risk of needing it before August.

[sailnautilus]

Ace sailmakers in East Lyme CT makes the Jordan Series Drogue.
http://www.jordanseriesdrogue.com
Very helpful and very high quality product....
The cost of the drogue was cheap compared to the cost of puttting the stainless attachment straps on the stern.....

[Matt Johnson]

There is a used Ace Jordan drogue on ebay US. They are asking way too much, but you could offer half price and be ahead. It's for a 70k vessel and would need a few cones removed, but that is quicker and easier than adding cones.

https://www.ebay.com/itm/Sea-Anchor-...ZatU2D&vxp=mtr

Matt

[Davidhoy]

Wouldn't nylon be a good idea, as the stretch will help manage shock loads. With very low stretch, dyneema would transfer those shock loads directly to the attachment point. I suspect that nylon would be an ideal line material for this kind of thing. Or am I missing something?

-David

[CaptJamesCook]

I would recommend everyone should read the mooring and anchoring page Jordan Series Drogue - Mooring and Anchoring on the Jordan drogue web page...http://www.jordanseriesdrogue.com
I would call it "Things you may never figure out on your own"

Or maybe it is just my lack of knowledge That made reading it so important!~


PS thank you sailnautilus

[Dockhead]

Originally Posted by Davidhoy

Wouldn't nylon be a good idea, as the stretch will help manage shock loads. With very low stretch, dyneema would transfer those shock loads directly to the attachment point. I suspect that nylon would be an ideal line material for this kind of thing. Or am I missing something?

-David

What shock loads?

The drogue is moving through the water, not attached to anything solid.

Nylon is weaker when wet, and is subject to unexpected failure under cyclical loads. Is heavy and bulky. Not what I want.

[Steadman Uhlich]

Originally Posted by Davidhoy

Wouldn't nylon be a good idea, as the stretch will help manage shock loads. With very low stretch, dyneema would transfer those shock loads directly to the attachment point. I suspect that nylon would be an ideal line material for this kind of thing. Or am I missing something?

-David

We think alike.

I think part of the principle of the JSD is to provide some "elasticity" to the pull it exerts on the boat, mostly through drag via the cones. I have read it has an effect like a elastic cord or rubber band, slowing the boat. So, perhaps some stretch of the JSD line would help.

Also, keep in mind the need for the JSD to be below the surface too. So, line weight may matter some (and end of line weight too).

[foojin]

What would a suitable dyneema weight be for a JSD of, say, 132 cones?

We have a JSD we built for our last boat. Never used. Weighs a ton. Now has to be lengthened a bit for our new boat, but I might remake it.

[akshiena]

A tractor tire with 200 ft of Nylon is a suitable drogue, just make sure whatever is the end load point can take your displacement , ...the loads will be large

Delivery of a 60n ft cat from Perth to Melbourne, no, I won't be doing that again soon....

[Davidhoy]

Originally Posted by Dockhead

What shock loads?

The drogue is moving through the water, not attached to anything solid.

Nylon is weaker when wet, and is subject to unexpected failure under cyclical loads. Is heavy and bulky. Not what I want.

Depending upon the sea state, you could have the drogue line going slack and then tight again as the boat accelerates down a wave, for example. If you have a very low stretch line, that sudden tension on the line will directly transfer to the attachment point, risking it pulling out over time. I'd be more concerned about ripping a cleat out of the deck than a nylon line failing due to cyclic loading. You can always upsize the line, and, especially for a drogue line, you don't use it frequently enough for that to be a real factor.

Just my opinion of course, I'm not an expert in these matters.

[Dockhead]

Originally Posted by Davidhoy

Depending upon the sea state, you could have the drogue line going slack and then tight again as the boat accelerates down a wave, for example. If you have a very low stretch line, that sudden tension on the line will directly transfer to the attachment point, risking it pulling out over time. I'd be more concerned about ripping a cleat out of the deck than a nylon line failing due to cyclic loading. You can always upsize the line, and, especially for a drogue line, you don't use it frequently enough for that to be a real factor.

Just my opinion of course, I'm not an expert in these matters.

According to the inventor, Don Jordan :

"
"The increased stretch will not reduce the load, in a breaking wave strike. In fact it will increase it a bit. The drogue must pick up the load quickly before the boat broaches and must turn the boat into the wave. The cones near the boat perform this function and THE LESS STRETCH THE BETTER [emphasis added]."

As quoted in this forum some years ago by CarinaPDX.