Alloy tube and step mast

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  • 08 Jul 2019 16:03
    Reply # 7768447 on 7580856
    Anonymous member (Administrator)

    If the mast top has been closed, I don’t think much condensation will form on the mast’s inside (without new, damp air coming in). Moreover, if any leaks can be avoided at the mast partners, for instance with this mast coat, and if the mast below deck has been insulated, my experience is that the mast step stays dry.

    Arne


    Last modified: 08 Jul 2019 16:04 | Anonymous member (Administrator)
  • 07 Jul 2019 17:46
    Reply # 7767356 on 7580856

    Thank you David. Yes, you make me think about solution to evacuate the water just above the mast step. My mast step is adjusted to the tube and i have not other choice to close the tube just a level of the mast step with a drain, I do not know yet well.

  • 07 Jul 2019 17:29
    Reply # 7767350 on 7580856

    The mast partners look excellent, Julien.

    If you cannot arrange a drain in the mast step, I suggest that you try to stop salt water from lying around the bottom of the mast, though fresh water will do no harm. This is where the wooden plug and poured polyurethane that I have used have an advantage, that no water can pool at a lower level than the top of the step. 

  • 07 Jul 2019 17:28
    Reply # 7767348 on 7580856

    But I still have a lot of questions to solve ... and my means are weak. What suits the spirit of junk rig is not it? ;)

  • 07 Jul 2019 17:20
    Reply # 7767341 on 7580856

    Hello arne,

    junk rig :)

    I will show more soon.


  • 06 Jul 2019 18:02
    Reply # 7766638 on 7580856
    Anonymous member (Administrator)

    Julien, 
    what sort of rig are you planning?

    Arne

  • 06 Jul 2019 12:39
    Reply # 7766436 on 7580856

    Thank you very much Arne for all these clarifications and for the photos.

    Your job is ever high quality, I do not have your know-how but I will do my best.


  • 06 Jul 2019 10:26
    Reply # 7766386 on 7580856
    Anonymous member (Administrator)

    Julien,

    I have made drains at the mast steps on all my boats, but I guess that is mainly because both my mast steps and masts used to be made of plywood and spruce. I don’t think an aluminium mast will corrode away, even if sitting in a puddle of water, in particular not if the mast tube (and step) has been anodised. My last two (lower part of the) masts has been of un-treated aluminium. Today I would recommend painting such masts with two-pot polyurethane paint (over etch-primer).

    The un-treated aluminium leaves a line of black stain on the sail. In addition, my guess is that a painted mast is smoother, and thus reduces friction when hoisting and lowering the sail, so that is another reason for painting.

    As for condensation on the alu. mast below deck. I haven’t noticed that, but I am sure, if I were to live on board and needed to heat the boat, the warmer, humid air would condensate on the cold mast. For that  -  but mainly for comfort reasons, I have insulated the mast with bubble plastic, a layer of PVC, and now finally, a knitted woollen coat.

    Arne

    PS: On my present boat I have (for the first time) strapped the mast to the mast step, both to prevent it from jumping out, and from rotating.

    PPS: To avoid problems with noise or other problems in the mast step:

    Could it be an idea to cut out a 2-4mm thick gasket from rubber, which fits exactly in the hole of the mast step? This should prevent metal-to-metal contact (= noise). I haven’t tried it myself...






    Last modified: 06 Jul 2019 17:31 | Anonymous member (Administrator)
  • 06 Jul 2019 05:52
    Reply # 7766253 on 7580856

    Hello to all, I have anothers questions:

    - Is it necessary to provide a water evacuation at the foot of the mast? Indeed, it can form a condensation inside the aluminum tube, but is it a risk of deterioration for the bottom of the tube in contact with water?

    - I imagine that it is necessary to maintain the bottom of the mast to prevent any rotation as well as any game from top to bottom. How do you proceed?

    Thank you very much for help me.
  • 16 Jun 2019 08:08
    Reply # 7582108 on 7580856

    Hello and thank you for your answers Arne and David,

    Maybe I will actually cut an aluminum sole for the step mast. I also like the idea of ​​the wooden heel but it seems more complicated for me and in my configuration. And i understand that the mast must absolutly not move with an aluminum sole in the bottom. I really adjusted the step mast both side to side . Will remain to maintain strong it up and down.

    Thank you again for your answers. I will not fail to complete my profile once the conversion is successful ... but not before, seafarer superstition requires :)


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