bow ballast tank pickup question

Discussion in 'Powerboats' started by gtflash, Oct 9, 2011.

  1. gtflash
    Joined: Jun 2006
    Posts: 128
    Likes: 0, Points: 16, Legacy Rep: 10
    Location: uk

    gtflash Senior Member

    I have a bow tank, that fills with water on a high speed planning hull. It has 1 3/4" dia pickup, and I am trying to guestimate the amount of pressure on the tank, for eg at 70mph and when filling.

    I need to fit an inspection hatch into the tank and want something capable of holding up under the forces
     
  2. jehardiman
    Joined: Aug 2004
    Posts: 2,475
    Likes: 198, Points: 63, Legacy Rep: 2040
    Location: Port Orchard, Washington, USA

    jehardiman Senior Member

    Well, ram pressure is 1/2*rho*v^2 so 73 psi give or take. That compartment better have some serious structure or be vented. If it is vented, max pressure is going to be geometry dependent.
     
  3. gtflash
    Joined: Jun 2006
    Posts: 128
    Likes: 0, Points: 16, Legacy Rep: 10
    Location: uk

    gtflash Senior Member

    3" vent..........
     
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.