nroose

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About nroose

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    Super Anarchist
  • Birthday 06/08/1966

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    nroose

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    Berkeley

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  1. nroose

    The new sailing twin skin setup

    I my experience, if you have a very flat, old stretchy sail, you see what "naturally" happens, which is that the max draft goes far aft. I think the wind kinda blows it there. But definitely, what you want is the max draft forward of the middle. And in heavier wind, you want less draft but farther forward. In lighter air, you want more draft but not as far forward. This is all affected by the cut of the sail, the stretchyness of the sail, and the way you trim it - cunningham, sheet, vang, halyard, and the way you bend the mast - in many boats, more bend will flatten out the draft close to the mast. And different sails on different rigs may respond a little differently to the different controls. But definitely the natural world is going to push the max draft aft and you want it forward.
  2. nroose

    The new sailing twin skin setup

    Depends on the way you trim it.
  3. nroose

    Vendee Globe 2020

    In general, I think all of the IMOCA boats look high drag. They are downwind and reaching beasts. But I guess the designs would be very different if there was an advantage to upwind VMG efficiency.
  4. nroose

    Luna Rossa Challenge. AC 36

    Definitely looks like a retractable prop to me.
  5. nroose

    INEOS Team GB

    They both are turning at various times... Not sure which times you are talking about. My goofy frame rate measure has them both just under 50 frames to go past the green mark just before 2 minutes. Which means they are moving at a little over 40 kts. It's definitely not very accurate. I think maybe within 10%. But I don't think there is really a more accurate way to measure the speed of either, relative or absolute, from this one video. The zoom is powerful and that makes it hard to know the exact relative distance from the camera or the angle to the camera that they are sailing, so comparing their speeds across the view is not meaningful.
  6. nroose

    INEOS Team GB

    I measure them at approximately the same speed at about 2 minutes in to that video.
  7. nroose

    Boats and foils comparison

    I think a big consideration is the very high apparent wind speed. Not really sure if it applies to most boats, but seems like a very small affect would be critical upwind on these boats. They are doing 20kts VMG. And apparent wind speed is probably well in excess of 40kts. With a very tight apparent wind angle. This requires very high efficiency/very low drag/very high power.
  8. nroose

    Team NYYC

    And you don't have a sense of humor either.
  9. nroose

    INEOS Team GB

    People crossing the boat at 1:38.
  10. nroose

    Vendee Globe 2020

    I found one where she talks about changing sails. She even talks about changing sails while up on the foredeck with the the sails. She even lays down on the sail she just took down. But not actual video of the sail change.
  11. nroose

    Emirates Team New Zealand.

    Oh. YT thinks you are posting this video for kids, so they disabled it.
  12. nroose

    Vendee Globe 2020

    I have watched a bunch now. It's great to see the people and the fast sailing. But I would really love to see them tack or jibe, or adjust their trim, or change a sail.
  13. nroose

    Emirates Team New Zealand.

    How come you are preventing us from adding to a playlist?
  14. nroose

    Emirates Team New Zealand.

    The 19th in NZ is the 18th in USA...
  15. nroose

    Luna Rossa Challenge. AC 36

    Seems like they would have been able to address structural issues internally? Some of these design elements are pretty mind blowing!