...to smash all records

Discussion in 'Multihulls' started by Manfred.pech, Jan 1, 2022.

  1. Manfred.pech
    Joined: Apr 2010
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    Manfred.pech Senior Member

  2. redreuben
    Joined: Jan 2009
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    Location: South Lake Western Australia

    redreuben redreuben

    Sailrocket did 65 knots not 55.
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  3. Tiny Turnip
    Joined: Mar 2008
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    Tiny Turnip Senior Member

    I'm delighted that the windsurfing speed record has just been broken - by a 52 year old. 56knots on 3 or 4 grands worth of kit is pretty cool.
  4. Flotation
    Joined: Jan 2020
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    Flotation Senior Member

    Seeing them compete against SP80 is going to be interesting.

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  5. Skyak
    Joined: Jul 2012
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    Skyak Senior Member

    When I saw the first post I thought that it was SP80 with a new sponsor...
    SP80 was posting to you tube about a year ago and were very pleasant to chat with.
    When I see these concepts I wonder how they get through low speeds -before supercavitation of the hydrofoil it's draggy, and that kite will likely need to be quite heavy to handle forces at top speed.
    BlueBell and Manfred.pech like this.
  6. fallguy
    Joined: Dec 2016
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    fallguy Senior Member

    Just a friendly observation, but it looks like a kite with an anchor.

    At some point, the benefit of being attached to water and the resultant drag becomes only a technicality.

    Apologies here. I see some benefit to designing the incredible less drag and less cavitation foil, but they are also coming up against the practical limit of how not to build an aircraft and then a better and better aircraft...
    DogCavalry likes this.
  7. Will Gilmore
    Joined: Aug 2017
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    Will Gilmore Senior Member

    They can't do what they are doing without the water. The faster option might be a rail, but without the directional resistance of the water, they would just be a dandelion seed floating in the air.

    They could go for a glider configuration. I want to know where the definition of a sail stops or a boat? Is it a boat because some portion is in the water? Is it a boat because it sits in the water when at rest? Does it count as a sail without the terran-based contact?
    BlueBell and redreuben like this.
  8. DogCavalry
    Joined: Sep 2019
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    DogCavalry Senior Member

    Yes, a dandelion seed. Of course without lateral resistance relative airspeed drops to zero, and the fluff drops to the ground.
  9. BlueBell
    Joined: May 2017
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    BlueBell . . . _ _ _ . . . _ _ _

    ...or is it a submarine?

  10. jehardiman
    Joined: Aug 2004
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    jehardiman Senior Member

    This idea has been kicking around since the mid-1970's. I wondered when somebody would pony up the money. FWIW, the depressor is needed, other wise it wouldn't work. For there to be a sail, there has to be a keel.
    Will Gilmore likes this.
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