Subject: Re: 40ft HP Update
From: Mike Crawford
Date: 6/10/2015, 3:39 PM
To: harryproa@yahoogroups.com.au

<<Depending on your requirements, it may work better to put a pop top over the cockpit and call it the saloon. >>

  This may be my dream boat design.  Not dream boat in the sense of an unlimited budget, but in the sense of the largest possible boat I could happily live on minimally while still being able to transport it on a trailer within the 12' wide load limit.

  Ideally, the boat would be as sleek as a Harry or Visionarry Sport, with just an open cockpit, wind, and sun.  Perhaps with the cockpit a foot wider in order to accommodate a narrow coffee table/footrest like:

    http://static.wixstatic.com/media/b09e79_897d05f972a3458e9574f87401e1f584.jpg_srb_p_711_948_75_22_0.50_1.20_0.00_jpg_srb

  The table could then swap out for nothing, or for a taller full-sized table when the cockpit is being used as a saloon.  There are some nice adjustable-height tables that can be used for both.

  For shelter, there would be a retractable hard top with the same lines and curves as the cabin, including a cutout for the cockpit. 

  When daysailing on beautiful days, the top would rest on the cabin top, or perhaps 1" above. 

  On hot, sunny, low wind days, the top could be raised for shade and the open cockpit section filled in with canvas.

  At anchor, two lines could run from the corners to the schooner masts, supporting a canopy over the trampoline.

  Then, if you want a room, add some roll-down clears.

  Kind of a pop-top proa version of a MaineCat.

  As I mentioned to Gardner, I like their design a lot. 

  I just would rather have a faster, lighter, more seaworthy proa with a longer lee hull and an unstayed mast, and would also like the option of sitting out in the sun holding the tiller instead of standing behind a wheel under a hard top.

  Rob: does a retractable hard top sound do-able?

        - Mike
 

 

Rob Denney harryproa@gmail.com [harryproa] wrote on 6/8/2015 8:26 PM:
 


On Fri, Jun 5, 2015 at 5:15 PM, robriley@rocketmail.com [harryproa] <harryproa@yahoogroups.com.au> wrote:
 

So why does the 40ft Cruiser not cut it for me?
http://harryproa.com/?portfolio=harry

Its the right size yet it severely lacks in accommodation.
Im thinking all is not lost

Originally the 40 was designed to be built in strip plank, so I would expect the newer infusion method would reduce building time, costs, and more importantly give back some weight to fund a more generous central cabin..

The design of the weather hull incorporates angled beams to the lee hull, and these beams limit the double berths from being moved outboard to the ends. In order to provide a meaningful central saloon cabin the beams need to be further out. In this way the saloon length can be made to a useful 3.2m, the landing for the windows stretches that to a spacey 3.6m of visual width.

The weight refund used in making the saloon isnt consuming as much as all that until any attempt is made to make it grow in width, and that and the roof is where I expect much of the available weight would be redistributed. In order not to waste that the cabins surround is round as it consumes less materials than a rectangular shape (78%). Much of the 11.3m circumference is around 0.6m high, and what approaches standing head room can only be afforded by a dished end roof of some 10sqm, that also provides some shade and protection for the cockpit outside as the cabin width at the floor only goes 2.2m across.

so is it feasible or a dog?

Feasible, biut there will also be tradeoffs in windage and perhaps waves hitting the beams if they are too far apart.   Depending on your requirements, it may work better to put a pop top over the cockpit and call it the saloon.  Sitting headroom inside when going upwind, standing headroom the rest of the time with zip on clears.   

 


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Posted by: Rob Denney <harryproa@gmail.com>
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