[C320-list] Mast Cranes and Asymetrics.

[Jeff Church]

Bruce,

When you rig a crane you would usually have the halyard exiting the mast about 3' below the masthead, bypassing the masthead sheave. I don't think there is any advantage to using an internal halyard, but when I've raised or doused the asym I haven't needed to control both the halyard and sock at the same time.  

JeffC
  ----- Original Message ----- 
  From: bruceheyman at cox.net 
  To: C320-List 
  Sent: Monday, August 13, 2007 12:40 PM
  Subject: Re: [C320-list] Mast Cranes and Asymetrics.


  Jeff and others,
  Is their an advantage to running the spinaker halyard through the mast and make use of the mast head sheeve?  I was thinking of using the extra mast head sheeve as a second jib halyard and then using the block on the crane for the spinaker.  That way when I'm setting or retriving the spinaker alone at the forward hatch I can have the spinaker halyard easily in hand while also having control of the sock.
  Bad idea?
  Bruce
  Somerset 671 SoCal
  Sent via BlackBerry by AT&T

  -----Original Message-----
  From: "Jeff Church" <jjemail at comcast.net>

  Date: Mon, 13 Aug 2007 12:29:06 
  To:"C320-List" <c320-list at catalina320.com>
  Subject: Re: [C320-list] Mast Cranes and Asymetrics.


  Bob,

  When I installed the crane, the guys at SailPlace advised me that the halyard should exit a couple of feet below the masthead, so that's what I did. 

  In retrospect, given how infrequently we use the asym, I wish I had tried to fly it before I bothered to add the crane.
   
  JeffC


    ----- Original Message ----- 
    From: Robert E. Sloat 
    To: C320-List 
    Sent: Monday, August 13, 2007 11:27 AM
    Subject: Re: [C320-list] Mast Cranes and Asymetrics.



    .......For the folks who added a crane, did you have to install an exit hole and 
    fitting in the mast for the spinnaker halyard going to the crane block?

    Bob Sloat
    Savannah Hull 894

    ----- Original Message ----- 
    From: "Irv Grunes" <igrunes at comcast.net>
    To: "C320-List" <c320-list at catalina320.com>
    Sent: Monday, August 13, 2007 10:03 AM
    Subject: [C320-list] Mast Cranes and Asymetrics.


    >
    > Hi,
    >
    > We are still looking at Asymetrics.  Looking for any comments on my scheme
    > below to eliminte the need for a crane.
    >
    > Found this Quantun website:
    >
    > http://www.quantumsails.com/pdf/asymmetrical%20trim%20guide.pdf
    >
    > I sent this to my sailing partner:
    > ============================================================================
    > ===================
    >
    > BUT the Quantum article says:
    >
    > --------------------------------------------------------------
    > What equipment do I need?
    >
    > . Spinnaker halyard that is above
    >
    > the forestay.
    >
    > ------------------------------------------------------------
    >
    > I am not sure of this BUT
    >
    > I think that our forestay goes to the top of the mast.
    >
    > I think the sheave for the spinnaker halyard is below it and lets assume
    > that it is on the port side.
    >
    > Then flying an asym on the port side, the halyard would not be in contact
    > with the forestay.
    >
    > Then if jibeing the asym to the starboard side, the halyard would have to
    > cross over the forestay and would probably chafe.
    >
    > As I think about it, I think the solution would be something like our
    > backstay adjuster that has the ball on the line to keep the thimble from
    > pulling up into the sheave.  If a stopper ball were put on the halyard, a
    > knot on the halyard to hold the stopper ball, and then 8 inches or so of
    > chafe guard were put on the halyard and then the shackle to the halyard.
    >
    > Then the sail would be hoisted that 8 inches or so lower, but when jibed,
    > the chafe guard would protect the halyard from the forestay.
    >
    > This would eliminate the requirement for a crane and allow us to use the
    > spinnaker halyard safely.
    >
    > I will bounce this off the list to see what response we get.
    >
    > Irv
    >
    >
    >
    >
    >
    >
    >
    >
    >
    > -----Original Message-----
    > From: Bob Seiden [mailto:theseidens at earthlink.net]
    > Sent: Sunday, August 12, 2007 8:18 PM
    > To: Irv Grunes
    > Subject: Re: Asym's
    >
    >
    > Bob
    >
    > Requesting quotes from a lot of the lofts.  Will keep you posted on the
    > quotes.
    >
    > Saw this at the quantum website.  See for setting and dousing
    >
    > http://www.quantumsails.com/pdf/asymmetrical%20trim%20guide.pdf
    >
    >
    >
    > READ IT!
    >
    >
    > We want it for running in light air.  That would seem to mean the middle
    > sail.
    >
    >
    > The diagrams seem to suggest that the head of the asymmetrical comes well
    > below the top of the mast.  Especially with a sock, that should keep the
    > head of the sail well away from anything it could chafe on.
    >
    >
    > Quantum says absolutely nothing about a crane.
    >
    >
    > me
    >
    >
    >