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Above Waterline Cockpit Drain Relocation

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  • December 04, 2013 10:03 AM
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    Reply # 1451655 on 1448569
    Deleted user

    Sorry, I'll try to be clearer.  The Dyna plate is the ground for ham/SSB radios and not meant to be a lighting ground although it is used for that on many boats. Because it is designed for that purpose it is porous as that makes it a better counterpoise, which also makes it explode when struck by lighting.  Attached to it is the copper bonding material generally ran throughout the boat for the counterpoise. Gordon West recommends doing away with the Dyna plate and the copper strapping for radios and simply running a single wire to a good sea water ground like a thru-hull as the sea water is the best counterpoise there is.   A single bolt with the lighting ground wire attached to it and the outside ground to a point as Bud states is probably the best way.  It is solid and not likely to explode with a lighting strike.  Number eight or six wire is what is ran for my lighting ground but I haven't done the bolt yet.  Truth is nobody understands lighting real well and is the subject of intense study.  It was the major topic in Nat. Geo. magazine.

    Jim 
  • December 14, 2013 5:44 PM
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    Reply # 1458357 on 1448569
    Deleted user
    I have been assuming that I would use Forespar (white plastic) thru-hulls for the above waterline cockpit drains but it just dawned on me how much my boat bucks out here in my exposed anchorage and that the thru-hulls would be constantly dipped or submerged in salt water.
    Also bucking a current or high rpm's of the diesel squats the ass end of the boat further exposing the thruhulls and aft ends of the inside of the hoses to salt water.
    Probably best to use bronze thru-hulls?

    Also, can anyone think of any scenarios where a seacock on the thru-hull would come in handy or even a life saver?

    I just bought a Herreshoff 28 about 5 weeks ago, the former retiring English prudent sailor had seacocks installed on above WL thru-hulls.   Mind you the boat sits low in the water, in fact I step from my Caribe inflatable onto the Herreshoff opposite of the climb up onto the Westsail. He sailed almost everywhere on the globe with the boat.

    So...
    Bronze thru-hulls?
    And, seacocks?

    Thanks,
    Carl
  • December 15, 2013 9:24 AM
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    Reply # 1458541 on 1448569
    Deleted user
    Of course!
    Someone lock me up, temporary insanity!

    Please see link below.



    Moderator, please repair or reset my link, attaching links from iPads do not work with this forums software.
    Thank you very much,
    Carl

    I added a return to the end of the string above - Jay

    Last modified: December 15, 2013 11:56 AM | Anonymous member (Administrator)
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