[Public-List] Mast Sheave Bolt

[Daniel Swords]

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


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> 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> 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> 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> 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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