Bamboo/ Steel hybrid mast?

  • 17 Dec 2014 07:04
    Reply # 3171556 on 3164484

    Hi David,

    That is good to know. Escrow looks quite reliable and glad it works! I think I'll ask whether the company uses Escrow before venturing into any discussion.

    Best wishes


    Roger

    Last modified: 17 Dec 2014 17:27 | Anonymous member
  • 17 Dec 2014 05:40
    Reply # 3171535 on 3164484

    Hi Roger,

    I bought the engine for Arcadian through Alibaba and used the Alibaba escrow service with no problem, everything went fine. I believe that most companies that deal through Alibaba will accept this service and may even be required to.  I suggest that you try this way of doing a deal.

    All the best, David.

  • 16 Dec 2014 18:04
    Reply # 3171191 on 3164484

    FYI

    In reply to David Webb's email, when I asked that Alibaba based company the below question.......

    Regarding payment, are you familiar with Escrow?

    http://www.alibaba.com/help/safety_security/products/escrow/how.html

    Escrow looks like a safe way to pay.

    ...... they suddenly were not able to produce a mast to my specs.

    Before I asked that question they were willing to make an anodised 12 meter mast, 250 bottom OD and 90mm top OD 5mm thick, and accept a direct payment into their account.

    When I asked what the mast weighed, they 'estimated' 70-80kg, which seems a bit light to me.

    When asked if they can anodize in white colour, they said can only do clear anodizing.

    When I mentioned ESCROW to other Alibaba companies, they also seemed to lose interest in my business.

    My gut feeling is that the companies are OK but Escrow puts them off. (perhaps Escrow charges a levy?)

    Has anyone done business through Alibaba before?



  • 15 Dec 2014 04:46
    Reply # 3170227 on 3169583
    Roger Scott wrote:

    In China I saw a 600 year old temple made out of Bamboo. It has its merits.

    Lotsa 600 year old stone churches in Britain :-) But I think both comments come under the heading of non sequitur :-) 
  • 13 Dec 2014 05:49
    Reply # 3169583 on 3164484

    Thank you David, I'll look them up.

    Hi Annie, yes, I realize the masts are galvanized inside, but galv does eventually rust too, so 'goop' or Fisholine is hopefully a good remedy.

    As David and others suggest, 5mm Aluminum is probably a better option altogether. It seems to work okay on the Freedom rigs.

    In China I saw a 600 year old temple made out of Bamboo. It has its merits.

  • 12 Dec 2014 04:47
    Reply # 3168890 on 3164484

    Hi Roger,

    just did a search on alibaba.com for aluminium flagpoles. There are several suppliers that may be able to send you an aluminium tapered pole section that would meet your needs. One that looked very good was Xiamen Hengzhuoxin Metal Products Co. who have flagplole sections in 6063 T6 grade aluminium up to 15 meters in length with a top diameter of about 5 inches and a wall thickness up to 5mm. They say that the bottom diameter is a factor of the height and give no specifics for it. You may want to try contacting them with your specific requirements and get a price for a section that would meet your needs. They can also anodize the section and do open base or a baseplate.

    All the best, David.

  • 07 Dec 2014 21:52
    Reply # 3165635 on 3165034
    Roger Scott wrote:Thank you David. Have chatted with Paul. Not sure if his templates are ideal for Shoestring. My gut feeling is La Chica is a very different boat and different rig. Am considering bamboo for more strength, floatation and dulling the halyard/ rain noise. Need to make sure bamboo is dried and treated. If I manage to complete tabernacle dream, can exchange bamboo if needed, or use mast to store spare battens!
    Roger - you can galvanise the mast inside and out.

    Then seal it - you can use one of many goops rather than welding it.  That way, moisture won't get in or out.  And it will float. 

    The bamboo will most certainly not add to the strength of the mast - but will add to its weight.

    The rain noise is a non issue.  It's a mast, not a roof.  I would follow David's (and lots of other people's) idea and use the self-expanding foam around the conduit.

    You've got bamboo on the brain and are beginning to get a little bamboozled by it, I think :-D

    Last modified: 07 Dec 2014 21:54 | Anonymous member
  • 06 Dec 2014 07:32
    Reply # 3165034 on 3164484
    Thank you David. Have chatted with Paul. Not sure if his templates are ideal for Shoestring. My gut feeling is La Chica is a very different boat and different rig. Am considering bamboo for more strength, floatation and dulling the halyard/ rain noise. Need to make sure bamboo is dried and treated. If I manage to complete tabernacle dream, can exchange bamboo if needed, or use mast to store spare battens!
  • 06 Dec 2014 01:57
    Reply # 3164961 on 3164484

    Hi Roger, the usual method of preventing rust to the steel and providing support for a conduit is to use pour in place foam with a PVC conduit in the center for any wires that may need to be routed to the top of the mast. This also has the advantage of dulling the ring of anything hitting the mast. I believe that Paul on La Chica used this method so a talk to him could be of some assistance.

    All the best, David.

  • 05 Dec 2014 10:41
    Message # 3164484

    Metal masts make me uneasy because of corrosion risks, but I am considering using 3mm thick galvanized steel round taper from china supported with dried and treated 12.50 Metre lengths of bamboo secured evenly around a central conduit and fitted snugly into the mast interior. The link talks about different kinds of bamboo and how to treat it. See below:

    http://www.guaduabamboo.com/blog/?category=Bamboo+Preservation

    I found a local grower in Auckland

    http://www.mybigbamboo.blogspot.co.nz/ and am weighing up the options.

    There is a risk of condensation coming out of the bamboo when in the steel or alloy mast, but would hope a thick coating of fish-oil would minimize the risk of corrosion.

    Also wondering can metal masts be vented to avoid condensation? Has anyone done that or found the need to do that?


    Thanks in advance.


    Roger



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