Jethrow

Spectra or polyester mesh for catamaran front tramps

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Hi all, looking for the accumulated knowledge from 'round the world again.

My front tramps are still sound but they look terrible because they have no edging and they are hard to keep tight. They are currently the tennis net style knotted rope tramps.

I'm considering changing them and I'm torn between the Spectra and Polyester materials. I want to keep the open weave style so not looking at Ferrari or Chicopee materials.

What are your experiences with longevity of each style? I've had the current ones for nearly 20 years so that's my comparison. ^_^

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Checkout Darrens nets on Top Gun in Pittwater. They were not cheap but look good and strong. XL2 has the same nets by the same manufacturer ith think it may be Gordon Myers but i may be wrong

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Cool, I actually contacted Gordon earlier in the weekend, good to hear he's got some stuff down here.

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No direct experience but I have heard that Spectra can be slippery (and I'd believe that).

I used polyester knotless fishing net. Cheap and cheerful but doesn't last forever in the sun.

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I replaced the polyester nets on Afterburner early with knotless spectra, and eliminated under wire supports.  Getting the nets tight puts high loads on attachments.  Got about 10 years out of them before some chafe issues.  We had skinny material.  Our nets deflected enough to provide good traction from the net holes themselves.  I replaced them with same.

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Where do you buy that stuff?

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Knotless spectra, Hampidijan , 40 mm squares, available in aust, made to size by Gordon Myers 0488026696. Take with aspro or panadol , its super strong but not cheap. Bottman

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I'm thinking of the knot less spectra nets to replace the polyester wing nets on my f82.  The polyester is pretty heavy and I'm hoping for something lighter and longer lived.  Good thinking or not

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Ullman sails up your way made some for my 10m cat, seat belt webbing style, stitched at every crossover, edged and overcoated with a UV coating.

No asprines  needed (to the point where it wasn't worth me stitching them myself), and most likely to get you  closest to 20y IMHO.

Maybe not the sexiest thing, but no-ones going to go through it either, and its tensionable.

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sorry Pil, I can only find a pic of the old ones onhand

Basically the replacement was the same format and construction, and looks pretty similar.

They have 2 stainless rods on laced sides, and stitched boltrope on hull sides.

These ones when I replaced them were about 12 years old, 10 of which were in QLD sun.They drain ok, easy on feet and wont do a zipper impression like fabric style.

 

 

662921185_wilderness9.3tramps.thumb.jpg.cb8d1c9d0dafe6f6c4104e8488ca1aaa.jpg

 

 

 

 

 

 

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We use knotless polyprop safety netting. We got 10 years out of the last ones we did still going strong when we sold her (Strontium Dog). On Morpheus we have used them again. The cost for these nets was about 400USD.  They stretch initially so need a tighten up after the first set (2 weeks) then they stay tight for years.

low res.JPG

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Ahhh bloody nets. The most important part and the biggest pain in the arse on Multihulls. 

Gotta say that I was surprised to recently hear the nets made by a specialist tramp maker for a well known large pod cat (see what I did there- no names mentioned) had zero take up space around the edge after the initial fitting. That would be rather disappointing as we know they always stretch and require further tightening. 

Anyways, I always used on Previous two tris black polyethylene (UV  resistant) knotted cod nets. About 30- 40 mm holes. With 4ml strands. Heavy on knees but good grip. Cheap n cheerful. Light weight and doesn’t take up water, let’s the waves through and doesn’t cause capsize at extreme angles of heel. 

Available from fishing net suppliers  

 Able to be tensioned nice n tight. Easy to re weave aluminium tubing or rope around the edge to take up stretched net. Possibly not the most Scmlick solution but can be quite neat if the left over edges are trimmed or bound to the perimeter   

In the other hand. Jouvert has front nets in 1 inch woven webbing stitched at each cross over , and sewn over an aluminium frame. Perimeter frame. Fairly recently replaced I was thinking of all the possibilities but just went with a replica of the existing nets. 

Quite naughty as the surface area is high and busting through waves loads up the atttachmebt points. But they are very comfortable  and surprisingly light. When it came to replacing them I thought I’d save weight using another material but these weigh virtually nothing and don’t take up water. Neil Tasker could tell you what they’re made of. 

The French tris always seem to have enviable knotted quite large hole nets.

I’ve always wanted to be able to get that stuff but it never seems available.  Bloody French!

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Nets are important.  I wove my own bow nets on my F242 with 3/16" poly.  I also made my own side nets for that boat with net fabric from Sailrite...that was a mistake since the resulting net was so slippery I had to go back and weave the 3/16" poly through the holes to provide  sufficient traction to keep crew on board.  Kinda like sails...they cost more than they ought, but try it yourself before bitchin' too much.

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On 6/20/2018 at 8:07 AM, deano said:

sorry Pil, I can only find a pic of the old ones onhand

Basically the replacement was the same format and construction, and looks pretty similar.

They have 2 stainless rods on laced sides, and stitched boltrope on hull sides.

These ones when I replaced them were about 12 years old, 10 of which were in QLD sun.They drain ok, easy on feet and wont do a zipper impression like fabric style.

 

 

662921185_wilderness9.3tramps.thumb.jpg.cb8d1c9d0dafe6f6c4104e8488ca1aaa.jpg

 

 

 

 

 

 

in my experience, these are damn heavy.

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I've seen the flat strapping with alternating doubled areas that let you actually weave the crossing pieces together so you don't have to stitch the junctions as mentioned above. I've also seen the crossings electro welded which should be better than stitching which is vulnerable to UV degradation. Anybody see the doubled stuff?

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I did this for the Team O'Neill catamaran.  Woven 2" heavy duty Polypropylene webbing, sewn with Tenara on a triple step zig zag stitch.  Great for windage and drainage.  Not the lightest, but i sleep well at night knowing that it's strong.  We usually see 15+ year lifespans for these nets.  

IMAG1009-1024x560.jpg

Tramp.jpg

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5 hours ago, Mulligan said:

I did this for the Team O'Neill catamaran.  Woven 2" heavy duty Polypropylene webbing, sewn with Tenara on a triple step zig zag stitch.  Great for windage and drainage.  Not the lightest, but i sleep well at night knowing that it's strong.  We usually see 15+ year lifespans for these nets.  

 

 

Thanks for this post...I've always discounted Polypro for use on the boat (anywhere) because it doesn't carry load well and UV degrades quickly.  Apparently it has improved. 

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its usually the stitching that goes, not the webbing itself. Heres the new tramps, which have been coated after sewing.

They probably do weigh more than netting, but this is on a cruising cat anyhow and they are not massively heavy.

I much prefer to know even if a strap split or died somehow, its not a drama, your still supported.

 

1407868763_newtramps.thumb.jpg.95e68f8a37cd1a317e141741f4a8746f.jpg

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1 hour ago, MultiThom said:

Thanks for this post...I've always discounted Polypro for use on the boat (anywhere) because it doesn't carry load well and UV degrades quickly.  Apparently it has improved. 

This is not the yellow Polypropylene!  We had a run of webbing done with twice the normal graphite for better u/v resistance. The Tenara is also excellent in u/v and rot resistance.  Each net is woven with one piece of webbing, spliced before weaving if necessary.  Then the net is prestretched, then sewn. We found that this balances out the net, with no sags. 

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6 minutes ago, Mulligan said:

This is not the yellow Polypropylene!  We had a run of webbing done with twice the normal graphite for better u/v resistance. The Tenara is also excellent in u/v and rot resistance.  Each net is woven with one piece of webbing, spliced before weaving if necessary.  Then the net is prestretched, then sewn. We found that this balances out the net, with no sags. 

That makes great sense to have it continuous.. How do you hold it's shape before it's sewn...? 

Very neat and clean

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5 minutes ago, PIL66 said:

That makes great sense to have it continuous.. How do you hold it's shape before it's sewn...? 

Very neat and clean

Techniques are a trade secret!  The one above was a bitch to get thru the Long Arm Bernina!  I seem to recall that it was something like 18’ x 14’. The aft net was much smaller, and a lot easier!

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I have both kinds but the rear is a huge pain in the ass to get tight enough

Nets.....jpg

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6 hours ago, PIL66 said:

I have both kinds but the rear is a huge pain in the ass to get tight enough

 

Funnily enough, if you look through your starboard jackstay (in the pic), you can just see the tip of my mast, the originator of the question! ^_^

Mine are a pain to keep tight too...

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