[Public-List] Mast Sheave Bolt

[Daniel Swords]

I tried hard to use the mast sheave and absolutely agree it would have been better but hanging from a bosun’s chair at the top of my mast I simply could not get the 3/8” halyard line to pass over the sheave and I did not have a wire to rope halyard available and I wanted to go sailing, so my quickest option was to shackle a block and use an all rope halyard. That was 5 years ago and I haven’t felt a need to replace it. But someday if I ever have a need to lower the mast or if the current system breaks I may try harder to use that sheave. 


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On Tuesday, March 10, 2020, 10:52 AM, Gordon Laco <mainstay at csolve.net> wrote:

Why not use the purpose-built main halyard sheave?
It has a nice large radius, is immensely strong, has a fair lead both up and down 
G

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On Mar 10, 2020, at 11:48 AM, Daniel Swords <danielswords at yahoo.com> wrote:


I have two blocks shackled to the pin mentioned for the main topping lift. One block now carries the main halyard and the other carries a second “halyard” attached to the aft end of my boom as a topping lift and cleated on the mast similar to the main halyard. I use this possibly “unique” system (it works for me) so I can raise the aft end of the boom quickly when reefing my mainsail, it makes it easier to pull in the leach reefing line, and I reef early and often. 


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On Tuesday, March 10, 2020, 10:18 AM, Daniel Swords <danielswords at yahoo.com> 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?


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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. 
> 
> 
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-- 
Jonathan M BreslerS/V Constance Alberg 30 #262Annapolis/Eastport MD