[Public-List] Mast Sheave Bolt

[George Dinwiddie]

Now uploaded to http://alberg30.org/maintenance/disorganized/sheave/block/

On 3/10/20 1:19 PM, Daniel Swords wrote:
> Inline image
> 
> BUT - as Gordon pointed out there are some definite potential failure 
> modes here and I would not recommend this system for hoisting a bosun’s 
> chair. This system works for me and has for many years without the use 
> of the mast sheave and without internal halyards but there are probably 
> better and safer ways to attach blocks to the masthead.
> 
> 
> 
> Sent from Yahoo Mail for iPhone <https://overview.mail.yahoo.com/?.src=iOS>
> 
> On Tuesday, March 10, 2020, 11:27 AM, George Dinwiddie 
> <gdinwiddie at alberg30.org> wrote:
> 
>     Daniel,
> 
>     If you send the photo to me, I'll be glad to post it on the website.
>     Include a description and I'll add that, too.
> 
>        - George
> 
>     On 3/10/20 11:18 AM, Daniel Swords via Public-List wrote:
>      > I just happen to have a photo!  Who can I post it to?  Can I
>     mention “Fa—-b—“ on this site or would that be rude?
>      >
>      >
>      > Sent from Yahoo Mail for iPhone
>      >
>      >
>      > On Tuesday, March 10, 2020, 10:15 AM, Gordon Laco
>     <mainstay at csolve.net <mailto:mainstay at csolve.net>> wrote:
>      >
>      > That’s exactly how our main halyard is rigged.  Nothing is
>     internal… just a traditional masthead sheave that carries the
>     halyard from the forward face of the stick to the after…
>      > Gordon Lacowww.gordonlaco.com
>      >
>      >
>      >
>      >
>      > On Mar 10, 2020, at 11:13 AM, Jonathan Bresler
>     <262alberg30 at gmail.com <mailto:262alberg30 at gmail.com>> wrote:
>      > All halyards external?
>      > The masthead on Constance has two pins abaft the mast: one is
>     used for the backstay, and the other for the main topping lift.At
>     least that is my recollection.  The main halyard line is external
>     but for the small part passing over the sheave in the mast. Where do
>     you hang a block for an external main halyard?   Photos?
>      > Jonathan
>      >
>      > On Tue, Mar 10, 2020 at 11:09 AM Gordon Laco via Public-List
>     <public-list at lists.alberg30.org
>     <mailto:public-list at lists.alberg30.org>> wrote:
>      >
>      > I have all my halyards external in Surprise’s rig, as she was
>     when she was built.
>      >
>      > We still win races, and I never worry about what’s going on
>     inside the mast that I cannot see.
>      >
>      > Gordon Laco
>      > www.gordonlaco.com
>      >
>      >
>      >
>      >
>      >> On Mar 10, 2020, at 10:59 AM, Daniel Swords via Public-List
>     <public-list at lists.alberg30.org
>     <mailto:public-list at lists.alberg30.org>> wrote:
>      >>
>      >> I have abandoned my mast sheave and internal halyards and
>     replaced them with simpler blocks and external halyards. You would
>     have to provide me with wind tunnel data to convince me that at 6.5
>     or even 7 knots of speed the difference between internal and
>     external halyards has any valuable significance on my 47 year old
>     boat anyway.
>      >>
>      >>
>      >> Sent from Yahoo Mail for iPhone
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>      >
>      >
>      >
> 
>     -- 
>       
>     ----------------------------------------------------------------------
>        When I remember bygone days                        George Dinwiddie
>        I think how evening follows morn; gdinwiddie at alberg30.org
>     <mailto:gdinwiddie at alberg30.org>
>        So many I loved were not yet dead, http://www.Alberg30.org
>        So many I love were not yet born.                          also see:
>                      'The Middle' by Ogden Nash http://idiacomputing.com
> 
>       
>     ----------------------------------------------------------------------
> 
> 

-- 
  ----------------------------------------------------------------------
   When I remember bygone days                         George Dinwiddie
   I think how evening follows morn;            gdinwiddie at alberg30.org
   So many I loved were not yet dead,           http://www.Alberg30.org
   So many I love were not yet born.                          also see:
                'The Middle' by Ogden Nash     http://idiacomputing.com
  ----------------------------------------------------------------------