Simpler low buck, stability underway ?

Discussion in 'Powerboats' started by FAST FRED, Jul 3, 2006.

  1. FAST FRED
    Joined: Oct 2002
    Posts: 4,519
    Likes: 110, Points: 63, Legacy Rep: 1009
    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    I look at the main forms of power cruising stability and don't like what I see.

    Paravanes seem to work but require masts and gear that increase the vessels air draft ,,
    UGH Bridges are everywhere and low boats are easier to cruise.

    Fancy stabilizers require vast electronics and gyros and a power source to operate , not likely to be owner repairable.

    The Mitsubishi boat gyro is expensive , complex and requires power.

    My concept is a centerboard trunk that has a shaped centerboard with an almost balanced tab at the rear. On running aground it would swing up as any board .

    For stability operation the tab would be able to give a good camber to the board and should be usefull to controll the roll.The CB would be "loose" enough to take an angle of attack inside the CB case.

    Power ?, the watch stander gets to be the gyro and power with a simple rudder bar as found on small aircraft.Step down on the bar side to bring the hull on that side up.
    Light line and blocks could transmit the modest power , and IS repairable onboard.

    Hopefully the center board antiroll system would not cause a helm change , we don't need to keep the watchstander THAT busy.


    Will it work on a 39.5ft X 7.5 beam, container shipable motor boat?

    Hopefully,

    FAST FRED
     
  2. marshmat
    Joined: Apr 2005
    Posts: 4,127
    Likes: 149, Points: 63, Legacy Rep: 2043
    Location: Ontario

    marshmat Senior Member

    I don't see any reason to shoot the idea down right off the bat, which is a good thing :D
    I might reverse the direction of the mechanism though- so that the helmsman leans toward the high side, to lower the high side. Then the helmsman's natural instinct to try to stay upright will actuate the mechanism.
    I imagine this could get a bit tiring for the helmsman after a few hours. Something similar to the power-steering pump of a truck, could be added to reduce the stress on the pilot.
     
  3. FAST FRED
    Joined: Oct 2002
    Posts: 4,519
    Likes: 110, Points: 63, Legacy Rep: 1009
    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    "Something similar to the power-steering pump of a truck, could be added to reduce the stress on the pilot."

    A complete system is not the problem, the question is weather in "manual reversion" just a couple of pullies and some rope the system will work.

    The fancy hyd / electric OTS gear does produce suficent energy to dampen most of the roll.

    CAN a "trick" centerboard at low angle of attack produce enough righting moment ? Is the prime question.

    FAST FRED
     
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.