[Public-list] Fw: Shackles for New Mast Top

[Gordon Laco]

Good morning fellows -

It sounds like you guys are thinking carefully about the project, but I
should suggest that use of shackles in standing rigging is not considered
prudent.  Are you talking about toggles?

Gord #426 Suprise






> Stephen,
> I've gotten personally involved in modifying the shackles to fit the new Mast
> Top for Christos and Alfredo (close, local friends), since I work with and
> have access to appropriate tools. Chris suggested that I post my modifications
> for others benefit.
> As all involved know, the suggested shackles don't fit between the outer
> plates on the new fitting. I modified the new shackles using a 4 1/2"
> mini-grinder, a cutting disk (very thin) and a grinding disk.
> First, I used the cutting disk to slice a thin sliver off one side of the
> shackle (about 1/8" between the disk's thickness and the sliver). This alone
> allows the shackle to fit between the plates.
> Next problem was fitting the pin. The slot in the shackle is not deep enough
> to fit the pin. Using the 1/4" thick grinding disk's edge, I started
> lengthening the slot. It didn't take too much to get the pin to fit, but the
> angle that the shackle was at was no where near correct for either of the
> stays. I started this with a 4 1/2" disk which was almost at it's maximum
> reach. I switched to a 6" X 1/4" grinding disk and continued on the slot.
> After several grind and check cycles, i found that by lengthening the slot all
> the way to the top of the Schafer Logo, the shackle fit and pivotted enough
> for either the forestay or backstay to have a straight lead. Of course, it has
> been a few years since I have been up close and personal with an Alberg 30
> Mast top with tight shrouds, so I might have gone a little too far.
> Considering the importance of a fair lead (especially on the forestay), I
> think not.
> Disclaimer..... I am not a design engineer and accept no responsibility for
> any work or design changes done by "others". I am also notirying my freinds
> that I did the work for that I accept no responsibility for the changes made
> to the parts (shackles). If they or others use the parts I modified or the
> methods, measurements proposed above, it is at their own risk.
> Regards,
> Brian    ex#497
> ----- Original Message -----
> From: Christos Katehis
> To: Brian and Elaine Timmins
> Sent: Tuesday, April 19, 2005 8:47 PM
> Subject: Re: Shackles
> 
> 
> I was thinking about that too (the slot), I wasn't sure if that had to be
> modified as well. Perhaps you should post your process on the list so the
> others can do the same. All in all it's a booboo on the designers side.
> 
> 
> 
> If it passes Brians test, it's fine with me
> 
> 
> 
> Thanks,
> 
> Chris
> 
> 
> -------------- Original message from Brian and Elaine Timmins
> <timmins at optonline.net>: --------------
> 
> 
> No, not with the right tools. Besides cutting down one side to make it fit
> into the mast top plates, I had to cut the slot longer to allow them to take
> reasonable angles to match the shrouds. They should be fine now. I want you to
> see (take) them well before you need them, just in case.
> BT
>   ----- Original Message -----
>   From: Christos Katehis
>   To: Brian and Elaine Timmins
>   Sent: Tuesday, April 19, 2005 4:06 PM
>   Subject: Re: Shackles
> 
> 
>   Thanks Brian;
> 
> 
> 
>   I will probably need them in two weeks, so in your trunk is a good idea. Was
> it tought work?
> 
> 
> 
>   Chris
> 
> 
> 
> 
>    
> 
>     -------------- Original message from Brian and Elaine Timmins
> <timmins at optonline.net>: --------------
> 
> 
>     Shackles and mast top are ready. I'll keep them in my trunk.
>     BT
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