[MHml] Friction in lines and blocks

[Ted Grossbart]

A variation on Ross's  situation on Rosebud2.  We run double ended  
trav and main sheet on winches.  We use the ST only for the non- 
operating end.  Powered up we have one guy with a winch handle in  
each hand  on the windward hull, and the tail of the sheets and trav  
and helm handled from out on the racks.  This works well and with  
only 2-3 wraps, release is instant.

tg


On Dec 6, 2007, at 9:30 AM, Ross Hobson wrote:

> Martin
> yes - have read that, not sure aetahetics is a good reason for a  
> desision, practicality comes higher on my list
>
> as i indicted on another email - hollmatro have a v nice snap  
> connection system on the VX40's - but what is the cost??
>
> and on Charleston, it would be less practical and less aethetic  
> than a ST winch.....
> we seriously considered hydraulics, but so far cannot see why/nor  
> advantages over winch with mainsheet man and play the main  on  
> traveller
>
> due to the size of our racks we would have to leave someone on the  
> hull to tend mainsheet either on winch or on hydraulic, this is why  
> we looked at a course/fine tackle set up as per lightspeed/seacart  
> 30 - so you can see the decsion process for us. we sail with the  
> mainsheet man on the hull, traveller man, helm and fore hand on  
> racks when powered up
>
>
>
> Ross
>
>
> -----Original Message-----
> From: multihulls-bounces at steamradio.com on behalf of Martin Schöön
> Sent: Thu 06/12/2007 11:33
> To: Informed discussion of multihull issues
> Subject: Re: [MHml] Friction in lines and blocks
>
> On Dec 6, 2007 9:57 AM, Ross Hobson <r.s.hobson at newcastle.ac.uk>  
> wrote:
>> we expeimented on the Formula 28 with a Seacart sytsem for ateh  
>> last half of the summer
>> and we have dupmed it, we could not control the sail sufficently  
>> not did it allow us a
>> comfortable 'safety margin' now we are back to a 4:1 main a 44St  
>> winch and deicated
>> mainsail 'hand'.
>>
>> ok Charleston is not a seacart 30 - we are way more powerful and  
>> this is probably why
>> their sysytem won't work with us, but i see no reason whay it is  
>> not a good alterantive in
>> a similar underpowered boat
>>
> Here is what the Lightspeed people think about all this (stolen  
> from their web):
>
> "3. Hydraulic Mainsheet. Another feature that we rejected early and
> have now come to
>  embrace. Winches are out for two reasons: safety and aesthetics. If
> you have winches,
>  the only safe way to use them is to have a person on the sheet 100%
> of the time, and
>  never put it in a self tailer. We got around this with a cascading
> course / fine system
>  giving 8:1 and 32:1. It works (it is easy to adjust and to blow), but
> has too much friction
>  (hence can be a beast to trim) and requires that you start with the
> course set just so.
>  Hydraulics will allow anyone to trim the main, and will have relief
> valves easily within
>  reach of the trimmer and helmsman. Aesthetics also matter, and while
> winches are not
>  themselves an eyesore, they do require routing the sheets right
> across the middle of the
>  boat -- giving it that multihull macrame look. The parts for this are
> on order, and
>  Tony Delimma at Forte has made us a new boom to take the high  
> compressive
>  loads -- this should be on the boat by early March."
>
> -- 
> Martin Schöön              "Problems worthy of attack
>                                          prove their worth by  
> hitting back"
>                                          Piet Hein
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