TEOTWAWKI Boat

Discussion in 'Boat Design' started by hoytedow, Apr 20, 2012.

  1. Frosty

    Frosty Previous Member

    Just thinking--how do you flush the lavatory in a hydrofoil.
     
  2. hoytedow
    Joined: Sep 2009
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    Location: North of Cuba

    hoytedow Wood Butcher

    Prop is trashed and only had 13 hours on it. My bad.
     
  3. SheetWise
    Joined: Jul 2004
    Posts: 279
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    Location: Phoenix

    SheetWise All Beach -- No Water.

    You jiggle the handle Frosty.
     
  4. Frosty

    Frosty Previous Member

    What --- no buttons. Oh its 2012 and no buttons.

    Or a switch perhaps.
     
  5. Submarine Tom

    Submarine Tom Previous Member

    Sorry to hear that Hoyt.

    Opportunity for a change in pitch and/or diameter though!
     
  6. Frosty

    Frosty Previous Member


    Give it here Hoyt,--Ille hammer it out --be just like new.

    Wanna bit more pitch --no problem!!!
     
  7. ancient kayaker
    Joined: Aug 2006
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    Location: Alliston, Ontario, Canada

    ancient kayaker aka Terry Haines

    NASA's solved this problem years ago - the main phone number is (202) 358-0000 - they'll direct you from there.
     
  8. Wavewacker
    Joined: Aug 2010
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    Location: Springfield, Mo.

    Wavewacker Senior Member

    That's not good Hoyt! I don't know about the cavitation between your hulls with the motor but I understand that moving it forward or further to the rear will help. But, you probably already know that... :)

    I do have a questions for ya, I don't recall seeing the displacement for your little cat, what will it carry and draft? I might try one very similar to yours at about 16' for a little river/lake cruiser....

    Hey Frosty, I never went in the lavatory, so I don't know how to flush it..... :)
     
  9. hoytedow
    Joined: Sep 2009
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    Location: North of Cuba

    hoytedow Wood Butcher

    Thanks, Frosty.

    Displacement is about 1000# and it easily carries 2 hefty adults over 250# and all necessary gear. Hull draft is about 6 inches.
     
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  10. hoytedow
    Joined: Sep 2009
    Posts: 5,402
    Likes: 194, Points: 73, Legacy Rep: 2489
    Location: North of Cuba

    hoytedow Wood Butcher

    I replaced it with a 9" pitch prop. :) Now to try it out.
     
  11. Submarine Tom

    Submarine Tom Previous Member

    Good for you.

    Sorry for not paying better attention, but what diameter was the last prop, prior to bedrock modifications?
     
  12. hoytedow
    Joined: Sep 2009
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    Location: North of Cuba

    hoytedow Wood Butcher

    9.25 inches.
     
  13. SamSam
    Joined: Feb 2005
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    Location: Coastal Georgia

    SamSam Senior Member

    A 'spun hub' is easily repairable. The old hub and rubber piece is pressed out and a new one pressed in. It cost me $50 to have it done.
     
  14. Frosty

    Frosty Previous Member


  15. messabout
    Joined: Jan 2006
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    Location: Lakeland Fl USA

    messabout Senior Member

    The original prop had 4 blades. Does the new one also have four?

    The boat will draw 6 inches when at rest with 750 pounds all up. A thousand pounds will need right at eight inches. The boat bottoms are 21 inches wide and a little arithmetic says that bottom loading, when planing, will be a little north of 50 pounds per square foot if the all up weight is 750 more or less. That is a lot of bottom loading for a teeny weeny little boat That loading is probably structurally OK because the boat is built hell for strong. Dynamicly, it is a bit much to ask from the beautiful little 9.9.

    Foils? Nah! Put a bottom between the hulls which would not be hard to do. The pontoons have healthy chine logs which will provide a place to accept fasteners. Now the boat will draw less than 4 inches at rest. Bottom loading will be much diminished, the driver sits in the middle for solo operation, and the boat will go like a bandit. The whole rig is heavy enough to make a blowover unlikely (but not impossible) but it might take some trim fiddling to keep it from porpoising on account of its short length.

    There, hows that for being a busy body who answers questions that were not asked?
     
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