• Announcements

    • UnderDawg

      A Few Simple Rules   05/22/2017

      Sailing Anarchy is a very lightly moderated site. This is by design, to afford a more free atmosphere for discussion. There are plenty of sailing forums you can go to where swearing isn't allowed, confrontation is squelched and, and you can have a moderator finger-wag at you for your attitude. SA tries to avoid that and allow for more adult behavior without moderators editing your posts and whacking knuckles with rulers. We don't have a long list of published "thou shalt nots" either, and this is by design. Too many absolute rules paints us into too many corners. So check the Terms of Service - there IS language there about certain types of behavior that is not permitted. We interpret that lightly and permit a lot of latitude, but we DO reserve the right to take action when something is too extreme to tolerate (too racist, graphic, violent, misogynistic, etc.). Yes, that is subjective, but it allows us discretion. Avoiding a laundry list of rules allows for freedom; don't abuse it. However there ARE a few basic rules that will earn you a suspension, and apparently a brief refresher is in order. 1) Allegations of pedophilia - there is no tolerance for this. So if you make allegations, jokes, innuendo or suggestions about child molestation, child pornography, abuse or inappropriate behavior with minors etc. about someone on this board you will get a time out. This is pretty much automatic; this behavior can have real world effect and is not acceptable. Obviously the subject is not banned when discussion of it is apropos, e.g. talking about an item in the news for instance. But allegations or references directed at or about another poster is verboten. 2) Outing people - providing real world identifiable information about users on the forums who prefer to remain anonymous. Yes, some of us post with our real names - not a problem to use them. However many do NOT, and if you find out someone's name keep it to yourself, first or last. This also goes for other identifying information too - employer information etc. You don't need too many pieces of data to figure out who someone really is these days. Depending on severity you might get anything from a scolding to a suspension - so don't do it. I know it can be confusing sometimes for newcomers, as SA has been around almost twenty years and there are some people that throw their real names around and their current Display Name may not match the name they have out in the public. But if in doubt, you don't want to accidentally out some one so use caution, even if it's a personal friend of yours in real life. 3) Posting While Suspended - If you've earned a timeout (these are fairly rare and hard to get), please observe the suspension. If you create a new account (a "Sock Puppet") and return to the forums to post with it before your suspension is up you WILL get more time added to your original suspension and lose your Socks. This behavior may result a permanent ban, since it shows you have zero respect for the few rules we have and the moderating team that is tasked with supporting them. Check the Terms of Service you agreed to; they apply to the individual agreeing, not the account you created, so don't try to Sea Lawyer us if you get caught. Just don't do it. Those are the three that will almost certainly get you into some trouble. IF YOU SEE SOMEONE DO ONE OF THESE THINGS, please do the following: Refrain from quoting the offending text, it makes the thread cleanup a pain in the rear Press the Report button; it is by far the best way to notify Admins as we will get e-mails. Calling out for Admins in the middle of threads, sending us PM's, etc. - there is no guarantee we will get those in a timely fashion. There are multiple Moderators in multiple time zones around the world, and anyone one of us can handle the Report and all of us will be notified about it. But if you PM one Mod directly and he's off line, the problem will get dealt with much more slowly. Other behaviors that you might want to think twice before doing include: Intentionally disrupting threads and discussions repeatedly. Off topic/content free trolling in threads to disrupt dialog Stalking users around the forums with the intent to disrupt content and discussion Repeated posting of overly graphic or scatological porn content. There are plenty web sites for you to get your freak on, don't do it here. And a brief note to Newbies... No, we will not ban people or censor them for dropping F-bombs on you, using foul language, etc. so please don't report it when one of our members gives you a greeting you may find shocking. We do our best not to censor content here and playing swearword police is not in our job descriptions. Sailing Anarchy is more like a bar than a classroom, so handle it like you would meeting someone a little coarse - don't look for the teacher. Thanks.

dorox

Members
  • Content count

    56
  • Joined

  • Last visited

About dorox

  • Rank
    Member

Profile Information

  • Location
    London, UK; Moscow, Russia

Recent Profile Visitors

518 profile views
  1. I can assure you - you woudn't see a potential AC founder there
  2. Nobody cares about sailing in Russia. It is just too far from being a national sport. And the oligarchs are having fun in RC44 which they can actually sail, as opposed to modern AC. There is also a language barrirer and the price of oil. There was an interesting endeavour of Gazprom with ESS, but it failed.
  3. Today's data. Oracle had non symmetric foils - look at the speed difference on the polar - port foil was worse. Not much of the straight line speed difference I would say. Probably tacking is killing them.
  4. Yes, and the median TWS is higher for NZL, which supports the point. I don't see much speed differential, not at all. Probably the most gains were created by maneuvers. I need to find the way to analyse that.
  5. Today's portion of "analytics": Tactics: median TWS for NZL - 8.7kn, USA - 8.5kn. Tacking: average VMG at TWA<30deg: NZL-13.8, USA- 13.13 Gibing: average VMG at TWA>160deg: NZL - 23.86, USA - 17.86
  6. Today's portion of "analytics": Tactics: median TWS for NZL - 8.7kn, USA - 8.5kn. Tacking: average VMG at TWA<30deg: NZL-13.8, USA- 13.13 Gibing: average VMG at TWA>160deg: NZL - 23.86, USA - 17.86
  7. Today's portion of "analytics": Tactics: median TWS for NZL - 8.7kn, USA - 8.5kn. Tacking: average VMG at TWA<30deg: NZL-13.8, USA- 13.13 Gibing: average VMG at TWA>160deg: NZL - 23.86, USA - 17.86
  8. New interpretations on rudder wings with nice pictures: https://docs.google.com/a/acracemgt.com/viewer?a=v&pid=sites&srcid=YWNyYWNlbWd0LmNvbXxub3RpY2Vib2FyZHxneDozOTUzMTc4ZGI2ZGFhOGFl https://docs.google.com/a/acracemgt.com/viewer?a=v&pid=sites&srcid=YWNyYWNlbWd0LmNvbXxub3RpY2Vib2FyZHxneDo3ZGE3NzkyOWM2NzU1Y2Vm
  9. I don`t know exactly, but my guess is that because there is larger heeling moment from the wing. This heeling is balanced by higher lift on the foil when compared to downwind. And higher lift equals to bigger angle of attack which leads to lower pressure around the foil. In simplier terms, for downwind foil is used to support only weight of the boat. For upwind it supports weight plus increases righting moment which requires higher lift.
  10. What I found interesting is the top limit they hit at high wind speed: appr. 15kn VMG or 25 kn SOG. I think this should be cavitation speed in upwind mode. Keep in mind that cavitation causes damage to appendages - they do not want to sail 100% unless it is their last cup race
  11. The dots I plotted are at "steady state" sailing. It is defined as change of average SOG over 10 s is less than 0.1kn and change of a COG over 10s is less than 0.1deg. Look at the polars - the course is changing within 20 deg when going upwind: sometimes they sail lower/higher, or they might put more or less pressure on the boat by adjusting the wing (they dont need to go 100% all the time, just enough to beat SWE)- this affects VMG.
  12. That's just one race. Every point represents a steady state straight line sailing for 10 sec. When all races are plotted on one graph it gets very messy.
  13. Well, polar graph on the top shows speed in knots at different sailing angles. 0 - dead upwind, 180- dead downwind. The lots of dots between 30 and 60 is the starboard upwind tack. Dots between 210 and 240 represent port downwind. Those two directions they sailed most of the time because the wind shifted right quite a lot. The bottom one is basically proportional to the lift to drag ratio of the wing and foil combined. The typical value for a keelboat would be 0.2 - 0.3. You see how Artemis is worse than NZL in light wind. And also is interesting how both teams basically hit the limit at high wind speed.
  14. Today NZL average upwind VMG of 14.8 against 13.4 of SWE. This difference of 1.4 kn equals to 200 m gain over 5 min of upwind sailing - pretty much what we saw today.
  15. Today's analysis. NZL is much faster upwind: average VMG of 14.8 against 13.4 of SWE. This difference of 1.4 kn equals to 200 m gain over 5 min of upwind sailing - pretty much what we saw today.