40 ft cruising cat design. First steps.

Discussion in 'Multihulls' started by bscatam, Mar 28, 2016.

  1. bscatam
    Joined: Mar 2016
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    bscatam Junior Member

    Just study.

    14.30 m x 7.90 m sport cruiser.
     

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  2. bscatam
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    bscatam Junior Member

    profile

    profile
     

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  3. bscatam
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    bscatam Junior Member

    lagoon look

    Alternative to Lagoon look. With extended WL to 12.75 m/42 ft
     

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  4. bscatam
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    bscatam Junior Member

    Fast cat

    And fast cruiser study. 47 ft
     

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  5. DennisRB
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    DennisRB Senior Member

    Thats a big improvement.
     
  6. bscatam
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    bscatam Junior Member

    Improved design.

    About to finish improved design. With longer WL - 12.75 m.
     

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  7. DennisRB
    Joined: Sep 2004
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    DennisRB Senior Member

    Earlier in the thread I suggested a little slope on the windows and longer waterline. You done exactly that and its much better IMO.
     
  8. UpOnStands
    Joined: Nov 2015
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    UpOnStands Senior Member

    Looks as if the helm chair creates a traffic choke point at the top of the transom steps.
    Is there anyway to shift chair/wheel fwd by about 250mm? OR, make the chair itself swing up and over the wheel and instruments to cover and protect them while at anchor?
    The vertical chair base can remain fixed and would pose minimal obstruction. edit: ummm, not exactly elegant or doable.

    Can you merge the aft roof supports with the davits? 2 vertical beams rather than 4.
     
  9. Emerson White
    Joined: Aug 2012
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    Emerson White Junior Member

    Rather than something super complex, how about a track and carriage with a locking pin on the top of the seat post and the bottom of the seat itself. Just shift the whole thing 15cm outboard when not in use. Wouldn't need to change anything else about the boat, a small contained fix that is easy to fabricate.
     
  10. UpOnStands
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    UpOnStands Senior Member

    true enough, just not sure how wide the seat is.
    As drawn the seating position reminds me of a friends Lotus super seven. rounding one corner in the passenger seat I nearly had a ear removed by a dog (short legged terrier) standing on the curb. Having the water seemingly in arm's reach would add a sense of sense of speed and excitement. Almost as good as a mono knocked flat where you look straight down into the abyss.
     
  11. bscatam
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    bscatam Junior Member

    Seat position.

    This are real dimensions. According to me its just enough.
     

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  12. UpOnStands
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    UpOnStands Senior Member

    50 cm is OK -- but look at those lower steps - really really wide - very nice.
    Does the chair swivel or is it fixed?
     
  13. Jim Caldwell
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    Jim Caldwell Senior Member

    I steering from there on a passage!
     
  14. waikikin
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    waikikin Senior Member

    I'd ditch the chairs and sit in the shade with autopilot on passage, the helm position is good for docking or close sailing but then I'd stand, the gap to steps needs to be closed with a drop board or similar at least high up with the lower open as scuppers, maybe a drop in bolster arrangment to lean against. The notion of hours at the wheel in an exposed spot dont appeal to me.
    Jeff.
     

  15. DennisRB
    Joined: Sep 2004
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    DennisRB Senior Member

    This is the charter cat. The sport boat style wind and sun on your face helms don't suit the SOR of a non performance charter boat which is driven on autopilot 99% of the time, and has divers and swimmers walking past where those helms are at anchor. That helm position is more suited to the fast cruiser you drew. This may be better with a single offset helm for cost and simplicity, but that seems hard with your FP style sloping roof. Not sure if a pop top would work either though, as the rear viability would be bad with the slope of the cabintop.

    Also can you explain why the slope of the cabin top seems so aggressive? Is the cockpit raised compared to the salon? What as the thinking behind this?
     
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