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RE: [AtkinBoats] New file uploaded to AtkinBoats

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  • Alan Boman
    Hi nasplundh Thanks very much for the article about Happy Clam, including the offsets. Terrific ! You can immediately see that Happy Clam doesn t make any
    Message 1 of 12 , Dec 12, 2011
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      Hi “nasplundh”

       

      Thanks very much for the article about Happy Clam, including the offsets.  Terrific !

       

      You can immediately see that Happy Clam doesn’t make any attempt to direct the wash leaving the transom downward to provide lift.  The photos of Happy Clam underway clearly show the stern “squatting” significantly and given that its draft is given as 11.5”, I wonder what minimum depth it would need to operate?

       

      Given that Rescue Minor seems to achieve the best fore & aft balance, I wonder why the later designs trended away from what I would have thought was a very desirable characteristic??

       

      Alan

       

      From: AtkinBoats@yahoogroups.com [mailto:AtkinBoats@yahoogroups.com]
      Sent: Tuesday, 13 December 2011 12:13 AM
      To: AtkinBoats@yahoogroups.com
      Subject: [AtkinBoats] New file uploaded to AtkinBoats

       

       


      Hello,

      This email message is a notification to let you know that
      a file has been uploaded to the Files area of the AtkinBoats
      group.

      File : /HappyClamSkiff.pdf
      Uploaded by : nasplundh <nasplundh@...>
      Description : Happy Clam article PDF

      You can access this file at the URL:
      http://groups.yahoo.com/group/AtkinBoats/files/HappyClamSkiff.pdf

      To learn more about file sharing for your group, please visit:
      http://help.yahoo.com/l/us/yahoo/groups/original/members/web/index.html
      Regards,

      nasplundh <nasplundh@...>

    • Greg
      Thanks for the Happy Clam Skiff! The plans show a speed of about 20mph with a 10 HP engine...any speculation what speed might be obtained with a 15 HP engine?
      Message 2 of 12 , Dec 13, 2011
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        Thanks for the Happy Clam Skiff! The plans show a speed of about 20mph with a 10 HP engine...any speculation what speed might be obtained with a 15 HP engine? I understand this is not a planing hull and it must "work" it's way through the water as opposed to skipping across the surface, so I'm not so sure more power will work at all. Any ideas out there?

        Around here there is A LOT of water, both fresh and salt and there can be a long way to go to get to your destination. My target / minimum speed is at least 25 mph and I am wondering if any of these Sea Bright Hulls can manage that speed.

        I also like the seaworthiness of these hulls as it would see some near coastal ocean water.

        Greg in SC, USA






        --- In AtkinBoats@yahoogroups.com, AtkinBoats@yahoogroups.com wrote:
        >
        >
        > Hello,
        >
        > This email message is a notification to let you know that
        > a file has been uploaded to the Files area of the AtkinBoats
        > group.
        >
        > File : /HappyClamSkiff.pdf
        > Uploaded by : nasplundh <nasplundh@...>
        > Description : Happy Clam article PDF
        >
        >
      • Alan Boman
        Hi Greg, A speed of 20mph is way more than the natural hull speed for a 17 boat, so you can safely say that it is well and truly planing. Atkin s first ever
        Message 3 of 12 , Dec 14, 2011
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          Hi Greg,

           

          A speed of 20mph is way more than the natural “hull speed” for a 17’ boat, so you can safely say that it is well and truly planing.

           

          Atkin’s first ever Tunnel Stern design from 1922, “Mischief”, is the fastest of any of them and is quoted as achieving 23mph with a 30Hp engine.  It was a bit longer at 23’ which would have helped I suspect, but it gives you an idea.  The shape of the tunnel may have been a bit different too, but the plans haven’t survived, so far as I’m aware, so I guess we’ll never know.....

           

          Alan

           

           

          From: AtkinBoats@yahoogroups.com [mailto:AtkinBoats@yahoogroups.com] On Behalf Of Greg
          Sent: Wednesday, 14 December 2011 3:33 AM
          To: AtkinBoats@yahoogroups.com
          Subject: [AtkinBoats] Re: New file uploaded to AtkinBoats

           

           



          Thanks for the Happy Clam Skiff! The plans show a speed of about 20mph with a 10 HP engine...any speculation what speed might be obtained with a 15 HP engine? I understand this is not a planing hull and it must "work" it's way through the water as opposed to skipping across the surface, so I'm not so sure more power will work at all. Any ideas out there?

          Around here there is A LOT of water, both fresh and salt and there can be a long way to go to get to your destination. My target / minimum speed is at least 25 mph and I am wondering if any of these Sea Bright Hulls can manage that speed.

          I also like the seaworthiness of these hulls as it would see some near coastal ocean water.

          Greg in SC, USA

          --- In AtkinBoats@yahoogroups.com, AtkinBoats@yahoogroups.com wrote:
          >
          >
          > Hello,
          >
          > This email message is a notification to let you know that
          > a file has been uploaded to the Files area of the AtkinBoats
          > group.
          >
          > File : /HappyClamSkiff.pdf
          > Uploaded by : nasplundh <nasplundh@...>
          > Description : Happy Clam article PDF
          >
          >

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