Recent Content by lmfoils

  1. lmfoils
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    Easter project 2009: Hydrofoil!

    Autumn Project 2012 After some tests during Easter, we were on the lake again a few weeks ago; the controller of the surfboard now behaves as...
    Post by: lmfoils, Oct 25, 2012 in forum: Boat Design
  2. lmfoils
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    Easter project 2009: Hydrofoil!

    BPL your understanding of our philosophy is appreciated! Intrepid71 Thanks! Indeed this is always a problem with surface piercing configurations,...
    Post by: lmfoils, Jan 14, 2012 in forum: Boat Design
  3. lmfoils
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    Easter project 2009: Hydrofoil!

    Winter Project 2011 As usual, one would be tempted to say, the team met at Christmas to test the latest development. This time it was an upgraded...
    Post by: lmfoils, Jan 4, 2012 in forum: Boat Design
  4. lmfoils
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    Easter project 2009: Hydrofoil!

    Thanks for the clarifications. We will of course consider your input for the design of the second version of the controller. Do you happen to...
    Post by: lmfoils, Jan 5, 2011 in forum: Boat Design
  5. lmfoils
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    Easter project 2009: Hydrofoil!

    Hello Tom, thanks for your interesting input! I assume you are referring to the Summer Project 2010. Many parts of the design were...
    Post by: lmfoils, Jan 4, 2011 in forum: Boat Design
  6. lmfoils
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    Easter project 2009: Hydrofoil!

    The problem is that the dynamics of every system have to be modelled, so unless you plan to fly a surfboard exactly identical to ours the...
    Post by: lmfoils, Jan 2, 2011 in forum: Boat Design
  7. lmfoils
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    Easter project 2009: Hydrofoil!

    Thanks! Yes two independent flaps per foil. The next step is to recalculate the model, in order to improve it's accuracy, add a 9 degrees of...
    Post by: lmfoils, Jan 2, 2011 in forum: Boat Design
  8. lmfoils
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    Easter project 2009: Hydrofoil!

    Here is the video! Notice the good roll stability given the noisy input of the wands. XbY4EV1bnU0
    Post by: lmfoils, Jan 2, 2011 in forum: Boat Design
  9. lmfoils
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    Easter project 2009: Hydrofoil!

    As Christmas came we started the core part of the Winter Project 2010. The aim of the project was to test a feedback control system for the T...
    Post by: lmfoils, Dec 29, 2010 in forum: Boat Design
  10. lmfoils
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    Easter project 2009: Hydrofoil!

    Here they are! As announced at Easter this summer we built the foils for the hull! See the complete report at www.hydrofoils.ch wWfNAGD-jBw
    Post by: lmfoils, Oct 14, 2010 in forum: Boat Design
  11. lmfoils
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    Easter project 2009: Hydrofoil!

    We are back again! This winter we bought and partially rebuilt a Yamaha 15A two stroke 15hp outboard. Easter came and the idea was to build a...
    Post by: lmfoils, May 13, 2010 in forum: Boat Design
  12. lmfoils
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    Easter project 2009: Hydrofoil!

    Since we do a lot of composite work, the various machines are at our free disposal and we have a lot of material lying around I really do not know...
    Post by: lmfoils, Nov 2, 2009 in forum: Boat Design
  13. lmfoils
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    Easter project 2009: Hydrofoil!

    chengtc i) I think you are referring to the flap deflection angle. Angle of attack is generally used for an entire wing and not for a flap. If...
    Post by: lmfoils, Nov 1, 2009 in forum: Boat Design
  14. lmfoils
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    Easter project 2009: Hydrofoil!

    Hi, flap control is done with a spring steel pushrod that moves in a plastic sleeving. Look carefully at this picture...
    Post by: lmfoils, Oct 26, 2009 in forum: Boat Design
  15. lmfoils
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    Easter project 2009: Hydrofoil!

    Thanks! We operated them at 5V, they are rated at 7.7kg.cm (106.93 oz/in.) at 4.8V. Since the distance between hinge line and flap horn is twice...
    Post by: lmfoils, Sep 4, 2009 in forum: Boat Design