[C38] How to approach an argument with a sailor

[Patrick Harpole]

I referred to a "displacement " which cannot plane.  I have about 20,000 pounds in my keel.  It will not plane.
There is no limit to the speed of a planing vessel.  That's is why catamarans go mast.
While in Florida I saw Whitbread (if you are not familiar....this is a race around the world) boats.  I would not call them nor America's Cup boats displacement vessels.  They are very light and have winged keels that bring them out of the water.
Patrick
P.S.  what is the fastest tack for a sailing boat?  Clue:  it is not downwind.
  ----- Original Message ----- 
  From: David A Hadfield 
  To: Catalina 38 Listserve 
  Sent: Tuesday, September 13, 2011 6:16 PM
  Subject: Re: [C38] How to approach an argument with a sailor


  Patrick

  On being uninformed.

  The SC37 can plane in downwind attitudes, 
  ie. go faster than calculated hull speed. 

  These are apples and oranges and one must be careful on exactly what one is addressing.



  On Tue, Sep 13, 2011 at 6:10 PM, Patrick Harpole <1derful at comcast.net> wrote:

    I sail a Catalina 38 and reached 12 to 14 knots sailing from Benecia to Berkeley.  The reason for the speed is an ebb current at 6 knots.
    There is no way a displacement vessel can reach greater than their calculated hull speed.  When one exceeds hull speed they are unduly stressing their rig...which might come down.  What a shame for being stupid.
    Patrick
    ----- Original Message ----- From: <david at dlrfilms.com>
    To: "Catalina 38 Listserve" <listserve at catalina38.org>
    Sent: Tuesday, September 13, 2011 5:47 PM
    Subject: Re: [C38] How to approach an argument with a sailor




      Not too long ago I saw a video of a CAL 40 running offshore in a big wind
      with a heavy kite. They were sustaining over 15 kts and hitting high
      teens.

      Does the Santa Crus 37 plane? If it does, 15-20 kts wouldn't be outrageous.




        Advice seeking time.

        So, I've got a friend who sails on a VERY fast boat. A very winning
        boat. Probably one of the fastest in San Francisco. It's crewed by a
        bunch of amazing sailors including some Cup guys. However, she's not
        really a sailor and I've had to explain things like what a knot is vs
        mph. The boat is a Santa Cruz 37 rates in a 27PHRF. Now, she claims and
        has some text messages from other crew saying they've hit 26knots in the
        bay. I call BS. I pull out all my math on hull speed, plain force
        calculations on what it would take to make that boat go into full plane.
        I've tried showing what PHRF means and that a 27 means they only average
        1/2 knot faster than the J/105's. I've tried pulling out their race
        times and showing they're only averaging about 6-7knots during races. .
        This does not matter.

         Probably most of us have seen exceedences in hull speed for our boats
        going down waves and whatnot. However, that's not the claim. The claim
        is they REGULARLY go 16-20 knots in bay races. This is 2x or more their
        hull speed. .

        Thoughts on how to explain this or anyone have experience with a SC37?

        Anders

        _______________________________________________
        Listserve mailing list
        Listserve at catalina38.org
        http://catalina38.org/mailman/listinfo/listserve_catalina38.org





      _______________________________________________
      Listserve mailing list
      Listserve at catalina38.org
      http://catalina38.org/mailman/listinfo/listserve_catalina38.org




    _______________________________________________
    Listserve mailing list
    Listserve at catalina38.org
    http://catalina38.org/mailman/listinfo/listserve_catalina38.org




  -- 
  Respectfully,
  David Hadfield

  Plan-B Design Group
  2011 E Gage Ave
  LA, CA 90255
  dahadfield at gmail.com
  SKYPE david.alan.hadfield
  www.bit.ly/planbdesigngroup

  310.871.2012 C



------------------------------------------------------------------------------


  _______________________________________________
  Listserve mailing list
  Listserve at catalina38.org
  http://catalina38.org/mailman/listinfo/listserve_catalina38.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://catalina38.org/pipermail/listserve_catalina38.org/attachments/20110913/c080af2b/attachment-0001.htm>