Proafile v5.0 | Updated: Jul 28, 2010

News

First Flight

Posted by on 09/21 at 05:45 PM


A working hapa model has finally been accomplished by Frenchman Luc Armant. It is the realization of the theoretically perfect sailboat: an airfoil and hydrofoil, tied together by a single line in tension. The massless sailboat has long been the dream of sailing pioneers from Bernard Smith's aerohydrofoil to D. Costes' chien de mer (seadog) to the hapas of J. Hagedoorn. The achievement cannot really be overstated, IMHO. Well done, Mr. Armant! The device is described in this (massive) PDF file. I look forward to the English translation.





Comments

  • Hi Michael,
    It’s hard to see the components in this video, looks very promising though. I have seen illustrations (artists’ conceptions) of similar “boats”. Though I can’t remember for sure where I saw them. I’m thinking I may have seen them in an article in Cruising World of all places.

    I think that the next great breakthrough (at least in racing) will be perhaps something like the “Vortex” or the hapa design – though you need a place for crew and stores, etc. I imagine that working on such a project gives an engineer / designer fits. Thanks for sharing this!
    Cheers,
    Rick

    Posted by  on  09/22  at  10:37 AM
  • Was it in Scientific American that I read Hagedoorn? It must have been in the late 70s. From that day I regarded my various hulls—Lightning hulls, 14s, ICs, you name it—as handy containers for crew and baggage. I corresponded with his son and do I remember correctly that his ideas were adopted for development by the US Navy? I imagined paratroopers landing on beaches under radar then gathering up their air and water foils, Sad, but possible.

    Thank you Michael. This video is wonderful. I want to pester M. Armant with questions but maybe I should translate his document first.

    Posted by John Turnbull  on  12/02  at  10:10 AM
  • Thanks for the comments. Interesting, and yes, kinda sad about the military application. Bernard Smith considered the naval warfare aspect also, which he would, considering he was literally a Naval rocket scientist!

    Posted by Editor  on  12/02  at  03:33 PM
  • You’ve been away from this blog WAAAY too long. Miss your writing.

    Posted by CC  on  12/20  at  09:39 AM

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