Mast Partner Design for JR

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  • 13 Feb 2015 02:10
    Reply # 3224987 on 3223038
    I have wedges on Fantail's mast.  Because mast and partners are not tapered, I used what are called (I believe) 'foxed' wedges where you drive thin ones in from each direction.  I then poured Gorilla glue down them which won't stick well to the anodised aluminium.  They haven't budged.  Around the foot of the mast, I pushed down lolly sticks.  These took a few sails to bed in, but I just added another couple at a time until they settled themselves comfortably.  I hate noise, too, but have found this method pretty satisfactory.
  • 12 Feb 2015 21:33
    Reply # 3224804 on 3223038

    After a brief, lively sail with Jonathan aboard Lexia recently, I can confirm that the Spartite collar is as quiet as one could wish. I don't know why it is as expensive as it is.

    I believe similar results may be obtained using pourable polyurethane, at half the cost.   It's a 2 component liquid used among other things, to make moulds for plaster and to seal joints in concrete floors. It comes in different hardness grades. Shore A80 would be about right. 

    David Tyler recommends a tapered socket coated with release agent, after he set the heel of his mizzen mast in the stuff and then found he couldn't get the mast out.

    Cheers, Asmat

  • 12 Feb 2015 13:36
    Reply # 3224324 on 3224241
    Graham Cox wrote:
    Ben wrote:
    I was tempted by products like Spartite but went for wedges for the ease of unstepping the mast.


    When we first bought Lexia and I sailed her some distance singlehanded I was alarmed at the noise the wooden wedges at deck partners made.  (I was still very much a junk rig novice. )

    Allspars of Plymouth recommended replacing the wedges with Spartite which they then did.  It was very reassuring to have eliminated the noise. 

    When the mainmast was lifted out later to repair the mast step, the Spartite came up with the mast and was then moveable up and down the mast.  (The tapered grp cone shaped deck partner and the mast had been 'greased' by Allspars with a release agent prior to filling the gap with Spartite.)  

    After the repair the mast was re-stepped and the Spartite plug tapped down into position again. 

    So, based on my experience, I suggest that Spartite need not be more difficult than wedges for unstepping the mast.  And then for restepping it, tapping down the existing Spartite plug would probably be easier than setting up wedges. 

    However, Spartite is not cheap and, for the committed DIY owner, wedges would perhaps be cheaper. 

    But over quite a few sailing miles now, the Spartite has required no maintenance and no adjustment.   

    I hope that this report might be helpful. 

     

    Last modified: 12 Feb 2015 13:52 | Anonymous member
  • 12 Feb 2015 06:47
    Reply # 3224241 on 3223707
    Ben wrote:I am talking about the cyclic flexing and creaking sound a freestanding mast can make at the partners. I am interested in wedge materials and partner designs that minimize the sound. Or any other remedy that works....thanks!

    I have steel partners and Western Red Cedar wedges.  When I first stepped the mast there were small gaps between the wedges and I had some creaking at times.  I later made a new set of wedges with bevel edges that have no gaps between them.  They are driven in tight and never creak.  You might need a stainless steel mast collar at the partners to use this set up.  I was tempted by products like Spartite but went for wedges for the ease of unstepping the mast.
  • 11 Feb 2015 21:31
    Reply # 3223769 on 3223707
    Deleted user
    Ben wrote:I am talking about the cyclic flexing and creaking sound a freestanding mast can make at the partners. I am interested in wedge materials and partner designs that minimize the sound. Or any other remedy that works....thanks!
    The PMC-790 urethane is a wedge material, there's no movement or noise.
    Last modified: 11 Feb 2015 21:41 | Deleted user
  • 11 Feb 2015 20:15
    Reply # 3223713 on 3223707
    Deleted user
    Ben wrote:I am talking about the cyclic flexing and creaking sound a freestanding mast can make at the partners. I am interested in wedge materials and partner designs that minimize the sound. Or any other remedy that works....thanks!
    My experience is that the mast is more likely to create noise at the mast step. The mast on Footprints is very tightly secured by hardwood wedges at the partners (squared opening and squared mast at this point), but the mast does work back and forward by only a several millimeters at the step when sailing and this makes a bit of a squeak, and oddly enough this really only seems to occur when the mast is to windward of the sail. 
  • 11 Feb 2015 20:03
    Reply # 3223707 on 3223038
    Deleted user
    I am talking about the cyclic flexing and creaking sound a freestanding mast can make at the partners. I am interested in wedge materials and partner designs that minimize the sound. Or any other remedy that works....thanks!
  • 11 Feb 2015 06:13
    Reply # 3223269 on 3223038
    Deleted user
    Ben wrote:What works and what doesn't? I like peace and quiet...
    Didn't know that can make a noise. We used something like Spartite, actually the substance they use but one grade harder to suit free standing masts. PMC-790 urethane. Works a treat.
  • 11 Feb 2015 00:59
    Message # 3223038
    Deleted user
    What works and what doesn't? I like peace and quiet...
    Last modified: 23 Mar 2015 15:50 | Anonymous
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