MaxHugen

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About MaxHugen

  • Rank
    Super Anarchist

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  • Location
    Port Macquarie, NSW, Australia
  • Interests
    Yacht Design & Performance

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  1. MaxHugen

    Emirates Team New Zealand.

    Justin is getting cheeky! But I thought only Aussies knew how to be "hoons"?
  2. MaxHugen

    Emirates Team New Zealand.

    I am assuming this is a satirical article... right?
  3. MaxHugen

    how old are you?

    Soooo right! I was extremely grateful for my training when my main parachute didn't open ("bag lock") at ~2500 ft, and I had to land on reserve chute in dense rainforest. Not that I would have needed a straw anyway...
  4. MaxHugen

    Boats and foils comparison

    Re-reading your Parts 1-6, with a lot more concentration now. Need your advice re XFoil... I've been using Analysis "Type 1", as I don't really understand Type 2, which it looks like you use from the polars in the H143 data. But I'm wondering if I should try to get my head around Type 2. For a start, the Density default in Type 1 may be an issue? Also don't know how the vals for Chord/Span/Mass affect XFoil? I'm using an Re calculated using NZ's avg foil chord of 0.32m, at a velocity of 50 knots (Mach 0.075), and the same Ncrit as you do. These are my Type 1 params in XFLR5: Any recommendations would be appreciated.
  5. MaxHugen

    how old are you?

    I was a late starter with kids. Was working on a theory that "practice makes perfect".
  6. MaxHugen

    Emirates Team New Zealand.

    Sad to see a boat, especially with history, in severe disrepair. Always been a bit of a fan of Bruce Farr's designs.
  7. MaxHugen

    Team NYYC

    Analysis of AM's Flout New term for me, a "flout" is what some are calling a "fly out". Interesting article on AM's "flout" and subsequent capsize at https://sailjuice.com/articles/why-do-ac75s-flyout-water Seems to have similar conclusions to my posts: Did Flight Controller Andrew Campbell Cause AM's Capsize? AM Capsize Analysis In short, due to the offset foil, any heel results in upward pitch. If not promptly controlled, this can lead to a "flout".
  8. MaxHugen

    how old are you?

    Old enough to have young grandkids ask if I was around when there were dinosaurs.
  9. MaxHugen

    INEOS Team GB

    Found this in Oz as well. Some very bright (and successful) people can be rather prickly, and reluctant to consider views other than their own. I quickly found that my team building skills were less than I would have wished.
  10. MaxHugen

    INEOS Team GB

    I think they may have been expecting a degree of heel, which would then reduce wetted area.
  11. MaxHugen

    Boats and foils comparison

    @barfy, in case you missed a previous post, there's a good YT video on cavitation. It also shows a bubble collapsing which is very cool - video will start at that section:
  12. MaxHugen

    Boats and foils comparison

    Great explanation and easy to understand. Thanks!
  13. MaxHugen

    Luna Rossa Challenge. AC 36

    Mr Doug's response was classic: "If I could take something away from NZ it would be three square metres of sail."
  14. MaxHugen

    Boats and foils comparison

    I have finally been able to make some changes, using a copy of your foil. Does appear that I just didn't have enough points. I'm using the "mixed inverse" mode so that I can modify one surface at a time, and yes, I'm now doing it incrementally. I have yet to work out how to adjust the leading edge using the XFLR5 interface, but having your foil as a starting point, I can try tiny adjustments there to see if/where I'm going wrong. A question pls: why is the forward half of the lower surface designed so that it produces no lift?
  15. MaxHugen

    Luna Rossa Challenge. AC 36

    Cool, I see you! You lucky lucky bastard! [Pls excuse the medieval Latin]