• 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.


  • Content count

  • Joined

  • Last visited

About Foyle

  • Rank

Profile Information

  • Location
  • Interests
    fast boat design, kite sailing, AC design

Recent Profile Visitors

1,507 profile views
  1. 80% that France are the first to Get Tae Fuck.
  2. Exactly this, though I suspect a little bit lower speeds. The AC72s were 40-42kts at about 16kt true wind speed on the reaches, so the more efficient AC50's in13-14kts wind are probably getting into mid 40's Boat Speed with incipient cavitation. Above that point you need to start designing foils to manage the cavitation onset smoothly and with less drag and damage. Below 40kts boat speed it is all about optimising the profile lift to drag.
  3. Ainslie is the face and the name, he is most certainly not the guy making the big calls - lacking the necessary management skills. For that you are looking at Martin Whitmarsh. He has had various leadership roles in McLaren through the last 2 decades at McLaren before being ousted in 2013, and now he has bought his talent to bear at BAR.
  4. Boo fucking hoo, do not trust any university generated 'studies' on gender bias, it all gets rammed through an appallingly skewed filter that strips out balance in favour of "social-justice" crusading conclusions for career gain. All graduates have to do shit jobs at times, it does not necessarily mean that there is significant gender bias. But consider; compared to males how many females spend their teenage weekend fixing cars, motorbikes or building model aircraft, or playing with robotics, or tinkering in the garage, or programming computers. Are the female graduates on average as passionate about engineering and problem solving? Your interest and motivation (as well as intelligence) are strong determinants in how well or fast you will progress in Engineering. If you are merely in it for the money (which is what makes Chinese engineers mostly shit), you won't progress nearly as fast. I know a few good female engineers, but none that are passionate about it (eg to the point of having engineering hobbies) as men - for them it is really just a job, and few of them seem to stay attached to the technical side of things over the longer term, they wander off (by choice) into more management and administrative side of things. Elite engineering is dominated by passionate engineers with 1 in 300 to 1 in 1000 intelligence, and surprise surprise they are mostly men.
  5. spray is mostly about the nose shape of the foil. The pointier you make the nose, the smaller the area of high stagnation pressure that squirts water out vertically upwards. But a pointy nose in highly disturbed and turbulent surface wave environment does not make for the lowest drag foil.
  6. Just because you can see spray doesn't make it important, it has very minor impact on overall drag. Skin drag (wetted area dependant) and induced drag (foil length and depth dependant) are orders of magnitude more important.
  7. Most male engineers would be delighted to have more female peers, the monastic workplace environment (aside from the interesting work) sucks socially. But engineering doesn't appeal to many women as a career, only about 1 in 5 engineering students are female, and many go into non-technical career paths once graduated.
  8. There is very strong tendency to conservatism in elite technical endeavours. Backing a radical idea that fails in a big organisation can kill your career, backing the conservative/consensus approach might not win you anything big, but won't get you blamed or fired (mostly won't be seen as your fault it you are unsuccessful using standard approach). That is why most breakthrough innovation happens in small startups.
  9. Yeah pretty worrying that Oracle can afford to have a crash bad enough to put them out for a week and suffer basically no consequence as they can still race in the AC, but whoever they hit would likely be eliminated. If you are JS and you have just one boat that looks faster than you, you might just be more willing to take big risks when racing them in races that mean nothing to your campaign.
  10. Sure, but the teams will have spent a lot of time optimising their twist profiles to minimise drag for a given driving force, and will likely all have converged to quite similar solutions. The lift foils are designed with a lot of twist so that the outer portion does the majority of the lift at typical foiling speed, the inner lower angle of attack section is primarily there for low-speed maneuvering and lift off where the foil has maximum angle of attack. So the righting moment will be very similar for all the boats - probably within 5%.
  11. All boats have nearly identical righting moment and so nearly identical lateral force. Visible spray might look problematic, but even (as an example) 100 litres per second being lifted 1-2 m only make roughly 5kg of drag and 40kg of extra lift needed at 40kts , which is perhaps 1.5% of total drag. It is likely far less than that, and could be reduced with horizontal fences on the foil noses - but teams have determined that that is better just to ignore it. Compared to the foil skin drag (which will be there regardless of spray) and the quarter wave and induced drag (tip vortex) being generated by the foil lift it is no big deal.
  12. Maybe true, would need much longer legs with bigger separations for wind spotting to be important, but short courses give more potential for screwing up manoeuvres. Hard to get bored in 20minute races even if they are walk-overs. Old IACC races could last 1-2 hours and were frequently very one sided (once lead was more than 20-30s) - really more boring in my opinion (though still very watchable).
  13. that is 1-2% faster than Artemis over 3? legs (~15 minutes?). Spot the ETNZ wheelie at 12:20ish (may not have been racing)
  14. ETNZ and Oracle will have a good idea of relative speeds from that, but we are none the wiser. That Slingsby has posted it suggests Oracle feeling happy enough.