l'hydroptere.ch

Discussion in 'Multihulls' started by DennisRB, Oct 11, 2010.

  1. Doug Lord
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    Doug Lord Flight Ready

    Hydroptere.ch

    from Tumbler: http://alainthebault.tumblr.com/

    l’Hydroptère.ch at over 30 knots

    Third and new record for l’Hydroptère.ch: The team of Alain Thébault exceeded the legendary and never exceeded speed of 30 knots over one kilometre on Lake Geneva.

    It was under pouring rain that last Thursday morning l’Hydroptère.ch surpassed the average 30 knot-barrier over one kilometre. 10 days before the end of the “Syz & Co Leman Sailing Speed Records”, the flying prototype conceived by Alain Thébault holds the “Pure Speed Record over one kilometre” on Lake Geneva at 31.46 knots or nearly 60 km/h (subject to the ratification by the CVSNG).

    This achievement further demonstrates the potential of the boat and is a great reward for the team and for the partners, Lombard Odier and Zenith Watches. It is also a real source of motivation for the future record attempts.


    click on image: (note steps and hydrofoils deployed)
    Image by Christophe Launay
     

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  2. P Flados
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    P Flados Senior Member

    Considering the amount of speed sailing attention that this lake gets, it seems strange that it has taken this long to get a boat over 30 knots for this distance.

    The fact that they used their small boat to do it does show that the Hydroptere team has gotten pretty good at understanding what it takes in the speed sailing game.

    I noted that there were also a couple of other accomplishments by this boat on this lake, but I did not dig up much detail.
     
  3. P Flados
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    P Flados Senior Member

    The little boat now has 5 lake records. SA posted http://vimeo.com/32666931 on their front page.

    One thing I noted right off is something that was a significant topic of discussion earlier. Regardless of appearance, this is truly a catamaran. The center structure rides up above the water at rest.
     
  4. Doug Lord
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    Doug Lord Flight Ready

    hydroptere.ch

    ======================
    That video is very interesting since it shows the boat sailing very fast with both stepped bows dropped down and both rudder t-foils retracted most of the way! The leeward t-foil is down a bit but not very much.....
     
  5. Doug Lord
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    Doug Lord Flight Ready

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  6. Silver Raven
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    Silver Raven Senior Member

    'T'foil extracted ???

    Hey bloke - U - O.K. ???

    Why would they 'lift' the 'T' foil rudder out of the water ??? Wouldn't it have helped the boat stay flatter (side-ways) while they were sailing. Sure is a great picture - showing good trim (fore & aft) @ 'great speed. Riding on that 'rail' would have made their (& mine) day.

    All my best mate, ciao, james
     
  7. Doug Lord
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    Doug Lord Flight Ready

    ================
    I'm ok more or less-thanks for asking! I guess they figure ,at that speed, using the planing step(you can see it deployed if you look closely), the windward t-foil would be superflous-just more wetted surface.
     
  8. Corley
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    Corley epoxy coated

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    Last edited: Jul 12, 2012
  9. Doug Lord
    Joined: May 2009
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    Doug Lord Flight Ready

    hydroptere.ch

    Good find, Corley-thanks!
     
  10. Corley
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    Location: Melbourne, Australia

    Corley epoxy coated

  11. Doug Lord
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    Doug Lord Flight Ready

  12. Corley
    Joined: Oct 2009
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    Location: Melbourne, Australia

    Corley epoxy coated

  13. Doug Lord
    Joined: May 2009
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

  14. Corley
    Joined: Oct 2009
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    Location: Melbourne, Australia

    Corley epoxy coated

    Looks like the front of the float has broken right off. Where the link moves the hull is the obvious weak spot. Photo courtesy of the Hydros website.
     

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  15. Doug Lord
    Joined: May 2009
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

    .ch

    ----------------------
    Given that the whole forward part of the hull moves to create the step I can imagine the fantastic loads on whatever holds it to the boat in a nose dive. Hope it was just a fluke and not a miscalculation. If they didn't get the loads right they may have to do substantial work on both mechanisms/retainers.
     
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