Mast Flex on a 42' wooden schooner?

Discussion in 'Wooden Boat Building and Restoration' started by Bobby Craigue, Apr 26, 2010.

  1. Bobby Craigue
    Joined: Apr 2010
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Beaumont, TX

    Bobby Craigue 42' Schooner

    I'm helping rig a 42' wooden schooner, when I was at the top of the 50' hollow wooden mast there was about 12" of flex, I'm 195 lbs, we did not have the fore and aft rigging in place. Is that normal? This is my first time to work with a wooden boat.
    Where can I find info on wooden mast and flex/strength?
    Thank you!
  2. Lurvio
    Joined: Jul 2009
    Posts: 283
    Likes: 18, Points: 0, Legacy Rep: 249
    Location: Mid of Finland

    Lurvio Mad scientist

    Wood tends to flex, to me 12 inches at that lenght sounds quite normal. :)
    A living tree flexes a lot more in the wind.
  3. LyndonJ
    Joined: May 2008
    Posts: 295
    Likes: 19, Points: 0, Legacy Rep: 233
    Location: Australia

    LyndonJ Senior Member

    It's loaded as a column so the moment of inertia is calculated normally and then you do a euler secant or similar analysis.

    the deflection sounds about right to me and wooden masts usualy taper or use thinner walls for the top section.
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.