[Public-List] Bulkheads

[Gordon Laco via Public-List]

Thank you for that recommendation Jonathan,  I'm going to fit them to my
plates this spring.

Gord #426 Surprise


On 2016-02-05, 9:23 AM, "Jonathan Bresler via Public-List"
<public-list at lists.alberg30.org> wrote:

> Thinking about chainplate covers.
> Schaefer covers have been mentioned a few times in the thread.
> Schaefer appears to have covers for 1-1/4"x1/8" chainplates (84-88/84-78)
> and covers for 1-1/2"x1/4" chainplates (84-90/84-80) as well as smaller and
> larger
> chainplates.  Our chainplates are 1-1/4"x3/16", if I measured and noted the
> sizes correctly.
> 
> Guessing that folks are using the  covers for 1-1/2"x1/4" chainplates
> (84-90/84-80) ?
> 
> Jonathan
> 
> On Fri, Feb 5, 2016 at 9:20 AM, Jonathan Bresler <262alberg30 at gmail.com>
> wrote:
> 
>> Backing up a moment, Don mentioned:
>> 
>> "The backstay chainplate offers a different problem. There is a moment of
>> force there because of the design. The top bolt is aft of all the the
>> others because *the chainplate is angled aft at the top*. Thus if the top
>> bolt fails from a bad knee, then the leverage is increased on the lower
>> bolts and shear is more likely. As the chainplate revolves around the
>> bottom bolt as the others shear, and it holds because there is no longer a
>> moment to shear it, once straight with the stay, there is a major overload
>> in a straight pull to cause the shear then, and there is no deck that can
>> hold that so the backstay flies free."
>> 
>> Needless to say, this scared the "stuffing" out of me particularly as it
>> does not match what I remember seeing in #262.....hurriedly went to the
>> boat last night to check.   To my relief, the backstay chainplate is
>> installed through the deck and bolted to the knee at an angle in line with
>> the backstay.
>> 
>> Did Whitby change the installation of the backstay chainplate at some
>> point ?
>> 
>> Jonathan
>> 
>> P.S.  backstay chainplate is 1-1/4" x 3/16" x 6" (below deck) with 5/16"
>> bolts, 1/2" pin in the chainplate and 1/4" 1x19 stainless steel wire
>> backstay.
>> 
>> On Fri, Feb 5, 2016 at 8:16 AM, Jason S via Public-List <
>> public-list at lists.alberg30.org> wrote:
>> 
>>> I also have had good luck with 3M4000 series UV..Very good seal and no
>>> cracking or seperation from chainplates or deck areas after 2 seasons.
>>> 
>>> Jason
>>> #457
>>> www.svsalacia.blogspot.com
>>> On Feb 5, 2016 8:05 AM, "via Public-List" <public-list at lists.alberg30.org
>>>> 
>>> wrote:
>>> 
>>>> 
>>>> 
>>>> For caulking chainplates I have tried numerous products over the 38
>>> years
>>>> we have owned the boat...my current favorite is 3M4000 UV.
>>>> 
>>>> 
>>>> Mike Lehman
>>>> 
>>>> ~~/)~/)~~
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> On Thu, Feb 4, 2016 at 2:56 PM -0800, "Stephen Gwyn via Public-List" <
>>>> public-list at lists.alberg30.org> wrote:
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> So what are people's favourite sealant? I've been using
>>>> BoatLife polysulfide sealant. Polyurethane  (3M5200 and Sikaflex)
>>>> is too permanent. Silicone is permanent enough and once you
>>>> use it, nothing will stick to where it has been.
>>>> 
>>>> I was reading a british sailing, which recommended a butyl sealant
>>>> which stayed sticky indefinitely, meaning that when the seal flexed
>>>> and split, it would just seal itself again.
>>>> 
>>>> Thoughts?
>>>> 
>>>> SG
>>>> 
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>> 
>> 
>> 
>> --
>> Jonathan M Bresler
>> Alberg 30 #262
>> Annapolis/Eastport MD
>> 
> 
>