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15179Re: [bolger] Stability

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  • Jeff Blunck
    Oct 31, 2001
      I read an article on this phenomenon and it's called "chine walking"
      especially if the boat has two motors and no trim tabs. Power boats with
      this quirk have to be constantly steered and trim adjusted with the trim
      tabs. I understand it's a common problem with deep vee hulls, especially if
      heavy built and high powered. It's not necessarily dangerous unless in big
      swells but gives a sea sickness inducing ride by flopping side to side.


      ----- Original Message -----
      From: <wmrpage@...>
      To: <bolger@yahoogroups.com>
      Sent: Tuesday, October 30, 2001 10:14 PM
      Subject: Re: [bolger] Stability

      > In a message dated 10/30/01 7:40:43 PM Central Standard Time,
      > jmbell@... writes:
      > > I've got a picture
      > > somewhere of a guy zipping around on an overturned library table fitted
      > > about a 5 hp outboard. That table is very clearly up on plane.
      > >
      > >
      > You must be either ancient or an antiquarian! I recall an advertisement
      > 100 years ago in the old "Rudder" magazine. I believe it was for Mercury
      > outboards, with a caption "Given the right power, I can plane a tabletop!"
      > It featured a photograph of a male planing a simple upside-down table (a
      > "kitchen table", I would call it, somewhat smaller and lighter than a
      > "library table"). I remember being skeptical that it had enough freeboard
      > him to get it started without some kind of special arrangements, but there
      > was no doubt that it was planing as nice as could be in the photo.
      > I agree that you are right on the money that "flat" is best for planing in
      > flat water. On another note, somewhere in Bolger's opus he remarks that
      > "deep-V" hulls, if driven fast enough, have a tendency to "flop" over on
      > side or the other and plane on one "side" of the "V". I've never
      > or witnessed that phenomena, but wouldn't want to be on board a boat that
      > that - it would have to be travelling at some prodigious speed - sounds
      > scary and dangerous.
      > Bill in MN
      > [Non-text portions of this message have been removed]
      > Bolger rules!!!
      > - no cursing, flaming, trolling, spamming, or flogging dead horses
      > - pls take "personals" off-list, stay on topic, and punctuate
      > - add your comments at the TOP and SIGN your posts, snip all you like
      > - To order plans: Mr. Philip C. Bolger, P.O. Box 1209, Gloucester, MA,
      01930, Fax: (978) 282-1349
      > - Unsubscribe: bolger-unsubscribe@yahoogroups.com
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