Bamboo and Aluminium Battens

  • 22 Dec 2012 00:03
    Reply # 1165039 on 1164913
    Gary Pick wrote:Good tool Jeff but not very adjustable as far as I can tell.:)


    Ummm... what do you mean not very adjustable?  It will make a wire clamp around any round or roundish object you can wrap wire around, from 5mm id fuel hose to, oh say, 200mm fence posts.  Larger than that if you make sure to take as much as possible of the slack out of the wire while attaching the tool.  I own a medium size one, and it will pull about 100 to 120mm of slack out of the wire while tightening the clamp.  I plan to use it to clamp on my mast coat, among other things.
  • 21 Dec 2012 19:50
    Reply # 1164913 on 912308
    Good tool Jeff but not very adjustable as far as I can tell.:)

  • 21 Dec 2012 17:38
    Reply # 1164787 on 1164455
    Gary Pick wrote:I have a fair bit of black 50mm webbing left so I could make batten parrels like David Thatcher has done. Just wondering how to attach the aft end to the battens. Hose clamp maybe?
    I've cut my battens to length and drilled a hole through each end and fitted 8mm eyebolts. I may have to plastic sleeve them to prevent corrosion between the two metals.

    Here's a tool that will beat a conventional hose clamp to death.  Standard disclaimer applies: I don't have any stake nor obtain any benefit if you buy one, but there's nothing like it for fastening to round things.  You can make a wire clamp, one strand, two, five strands - whatever you like - of any size that you can wrap a wire around, and make it as tight as you could possibly want.  You can use it to clamp fittings on hydraulic hoses.  It's an amazing tool.
    Last modified: 21 Dec 2012 19:06 | Anonymous member
  • 21 Dec 2012 04:54
    Reply # 1164455 on 912308
    I have a fair bit of black 50mm webbing left so I could make batten parrels like David Thatcher has done. Just wondering how to attach the aft end to the battens. Hose clamp maybe?
    I've cut my battens to length and drilled a hole through each end and fitted 8mm eyebolts. I may have to plastic sleeve them to prevent corrosion between the two metals.
  • 03 Dec 2012 08:48
    Reply # 1151038 on 912308
    I ordered my battens today. 6 @ 6.6m x 44mm x 1.6mm...$297. They don't need to be that long but that's how they come. I should have them sometime next week.
  • 28 Nov 2012 05:07
    Reply # 1147525 on 912308

    The 3 alloy battens on Footprints are of T5 alloy. From memory 63mm in diameter but only 1.5mm wall thickness. The theory being that by going up in diameter you gain strength. They are very lightweight. Because we can only get 5m lengths of alloy in NZ and my battens are 6.5m in length I preferred not to sleeve or weld the alloy so I used the cedar from my previous timber battens to make up the extra length. So far there has been no sign of bending and they seem to be as stiff as the other 4 carbon tube battens. I know though that I will need to be very careful about gybing in strong wind conditions.

    For my previous flat sail I was very happy with the cedar battens which were reinforced with a layer of unidirectional fiberglass on each side. At the time they seemed to be the best option cost wise and weight wise especially compared with alloy which once again I would have needed to sleeve because of the length requirement. Those cedar battens developed just the right amount of curvature in stronger winds. Normaly cedar would not be a suitable timber for battens but with the unidirectionals on either side it was OK and being cedar it is very light when compared with other timbers. I always thought it should be possible to engineer in a bit of bend in the timber battens by reducing the timber thickness at the point where the bend is required and with the unidirectional glass reinforcing the battens should still not break - but I was never brave enough to actually do it !

    Last modified: 28 Nov 2012 05:11 | Anonymous member
  • 28 Nov 2012 03:48
    Reply # 1147480 on 912308
    Metaland price for T591 38.1x3.2 is $60.70 including GST. The price for the same size in T6 will no doubt reflect it's rarity.
    T5 44mm x 1.5mm at $30+ is looking better and better, despite it's inferiority.
  • 26 Nov 2012 20:13
    Reply # 1146294 on 912308
    Thanks Brian.
  • 26 Nov 2012 19:40
    Reply # 1146271 on 912308
    Gary Pick said: "Wondering if I should either rename the topic or move the discussion to say Batten Specs?"

    May as well carry on here, Gary. I've changed the topic title and have put a link to it under the last post in Batten Specs'.

    Last modified: 26 Nov 2012 19:47 | Anonymous member
  • 26 Nov 2012 10:12
    Reply # 1145917 on 1145276
    Paul Thompson wrote:I'd be happier if it were T6 but it should be fine. You could possibly consider going for the 3mm wall for the top two sheeted battens.

    Paul that did cross my mind as the top two will cop the highest stress, being the last to reef. I didn't get a chance to phone Metaland, just too busy today. Apart from the apparent difficulty of getting T6 the thinking behind going for T5 is the weight ratio. 44mm thin wall verses 38mm thick wall, by my understanding the difference in weight is substantial.
    Wondering if I should either rename the topic or move the discussion to say Batten Specs?
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