[MHml] wire rope splice

[Bill Gibbs]

My NZ RFQ is 2 weeks old, they don't seem especially interested.  Matrix Mast built my last one, but the individuals seem to have
moved on.

The search continues.

Bill
Afterburner

-----Original Message-----
From: multihulls-bounces at steamradio.com [mailto:multihulls-bounces at steamradio.com] On Behalf Of Paul Nudd
Sent: Tuesday, May 22, 2007 10:19 PM
To: Informed discussion of multihull issues
Subject: Re: [MHml] wire rope splice

Presumably your original was made in NZ. Maybe you will have to source a 
replacement there. The kiwi's seem to be good at keeping the old 
technology going alongside the new, e.g. the old cars there in good 
condition.
PN

Bill Gibbs wrote:
> KKMI of Richmond, CA and Rigworks of San Diego, CA have declined to make me
> a new halyard .  KKMI doesn't do wire-to-rope or metric wire (10mm is damn
> close to .375)  RigWorks doesn't swage .75" diameters.  Sheesh.
> My spectra experiment better work.
> 
> Bill
> Afterburner
> 
> -----Original Message-----
> From: multihulls-bounces at steamradio.com
> [mailto:multihulls-bounces at steamradio.com] On Behalf Of Dave Culp
> Sent: Tuesday, May 22, 2007 7:06 PM
> To: Informed discussion of multihull issues
> Subject: Re: [MHml] wire rope splice
> 
> Did you mention to Evan, Bill, that you can use up to 5 "beefy guys"
> to sweat this halyard up? Those guys alone, using your (patented, I
> presume) "row, row your boat" sweating style can get many hundreds
> (50??) of pounds of force even before the winch comes into play. Panic these
> guys, and who know what force you can generate?  ;-)
> 
> I'd stick with spectra and sleep nights, myself. Maybe consider Vectran, if
> the tail remains mostly inside the mast at her berth.
> Easier to splice--all the "big guys" use it.
> 
> Dave
> 
> On 5/23/07, Diane Selkirk <ceilydh at 3web.net> wrote:
>> Bill Gibbs wrote:
>>> Raising the main sail headcar a couple inches to unlock while sailing
> downwind in 35+ knots does require quite a load on the tail.
>>> What do you figure the max load a motivated (aka "terrified") beefy 
>>> crew with a 52 winch can apply is?  5,000 pounds?  More?  That's over
> 70% of 12mm polyester double braid breaking strength.  Not as big a safety
> factor as I thought at first.
>>>
>> Double handled winch handle, beefy guy = 65 lbs normally
>>
>> Add terror = 75 lbs ? x 52 = 3900 lbs.
>>
>> Harken says - about 45 lbs maximum (assumes single handle I think) and
> normal sized human.
>> Doubt you can get to 96 lbs (5000/52) unless you are really big (like AC
> grinder big).
>> Then add in friction losses etc.
>>
>> I just did a load test on a hand operated davit with a winch with a 50:1
> ratio.  Got to 1100 lbs with some effort.  Handle was not ideally placed for
> maximum leverage.
>> Evan Gatehouse
>>
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