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Showing content with the highest reputation on 10/10/2020 in all areas

  1. 7 points
    There is a lot wrong with this. To start with, there were many syndicates and designers who had experience of big cats. It wasn't exactly a new art. As for wings, sure, Oracle had experience of a big wing that nobody else had, but that wing was very, very different from what was proposed for the AC72 and there were people who had designed and built far more relevant wings who were available and who were employed by teams. Bottom line is that cats and wings were nothing new. At best, you could argue there was a scaling advantage on the wing, but that was offset by the crudeness of the DoG challenge wing. There were at least 5 or 6 designers who had designed and built cats of that size or bigger (one sailed in the previous AC). Before Oracle announced the AC72 rule, I know there were teams who had been working on their multihull design tools and who had investigated wing rigs. Every team could and did employ both designers and sailors who had experience of both cats and wing rigs. Any lead that Oracle might have had was small. In contrast, the AC75's are a whole new type of boat that nobody had any experience of at all. When the rule was announced, the only designers who had any experience of designing and predicting performance of the class were the ETNZ designers who had spent 6 months working on it. The rig was a whole new thing and the ETNZ sailors had spent significant time sailing with a scaled down version. Again, nobody else had that experience or had built performance prediction models. When the rule was announced, both the sailors and designers of ETNZ were significantly ahead of every other team. Those really are the facts. Did ETNZ do anything wrong? Not really. If it wasn't for what Dalton had said in the past, nobody could have any complaints. My only complaint is that Dalton, on behalf of ETNZ, had, in the past, bitterly complained about a defender gaining advantage over the challengers through the writing of the design rule. Arguments on this forum that defended Dalton centred around the idea that not only would ETNZ not do the same thing, but that RNZYS, being a proper club with cup experience, would keep the team in check. The reality is that Dalton, ETNZ and RNZYS have conveniently forgotten what they got so upset about in the past.
  2. 4 points
    Over she goes. Whoops, it happens.
  3. 4 points
    I nearly killed my then-girlfriend (and crew) during a stormy overnight race. Unbeknownst to her, a precious family heirloom engagement ring was stuffed in a drawer below. I proposed at sunset in a nice marina a couple days later and she said yes. I knew the race was still fresh in her mind, so if she said yes, it was meant to be. We got married at a historic lighthouse on the Chesapeake. It's in private hands but it's still lit. We sail past it often and it always reminds us of that incredible weekend. She really is good crew. I trust her. I tell her that all the time. We race together, doublehanded with a symmetric chute. It drives me nuts that she doubts herself. When she observes other wives that can't or won't touch a sheet or hold the tiller for a few minutes, *then* she puffs up with pride about her skills. I just wish she felt that confident all the time. I'm looking forward to getting her into the Atlantic next summer, and to Maine.
  4. 3 points
    "You can have my PHRF rating when you ply my cold dead hands off of it; buddy". I worked hard, politic-in, smoozing, buying drinks at the club bar and sandbagging every other race to snag that gift rating from Mr. Chief Handy Capper and have no intention of having some swarmy brainiac engineering nurd with a VPP app and portable supercomputer steal it from me! Ain't no damn way in hell we here Sailbillys at the Lake Ullafalulaa Floating Yacht Club on Pier D gonna allow you smarty-pants Yanquis from north of the Mason-Dixon come in here and stir up the pot just so some young wannabe sportboat loving yuppy from the burbs can compete on his abilities and boat. He can just earn his handicap they way we did, one small 3 sec tick at a time. CAN I GET A GOD-FEARING AMEN?
  5. 3 points
    +1 for everyone recommending getting a dinghy. To go cruising, especially longer-distance, you need to know how to operate the boat, navigate, park, maintain the engine/electrics etc, but you also need to know how to sail. Pretty much the only way to learn to sail well is in a dinghy, but the great thing is that it's a lot cheaper and more convenient than anything with a keel/cabin. Start with a scruffy old Laser/Sunfish/whatever, it doesn't need to be shiny, and just go sailing. Do some club racing if you can. By all means get your first big boat at the same time and start building experience with all the other stuff, but get a dinghy. At some point when you're cruising you're going to find yourself in a situation you didn't plan for. Big breeze off a lee shore with a rope round your prop; engine won't start and you need to pick up your mooring (which is behind all the other moorings) or get onto a dock under sail; middle of nowhere, it's blowing 50 knots and the main halyard's jammed. Whatever it is, you'll be very glad indeed that you learned to sail in a dinghy. When I started sailing big boats, you could immediately tell the dinghy sailors. They were the ones you wanted trimming and helming in races, and they were absolutely the people you wanted on the wheel/tiller if things got a bit hairy. It was perfectly normal for dinghy-sailing kids in their early 20s to step onto an offshore race boat with little or no previous big boat experience, and be able to drive it better than anyone else on board almost immediately. To begin with they'd probably be a liability if you let them out of the cockpit, but they knew how to make the boat go, and how to keep it upright.
  6. 3 points
    My deepest condolences. Experience tells me that there usually isn't any return once on the morphine drip. Experience also tells me that much more damage is done when the truth is withheld than when it is shared. My advice, for what it is worth, is that you must tell her, and if lockdown means that you can only tell her by phone then so be it. I do not envy you that task. I won't wish you luck and as an atheist I can't say I'll pray for you but you have brought me to tears. Stay strong.
  7. 2 points
    Martin Congrats on the new boat. Settings are one thing, but as you have discovered and implied, sailing technique is where it is at and there are some things that aren't so obvious. What is obvious is that there is no wand, which used to help by managing flight height changes with a given set of settings, so that for any crew weight position and sail time, it make adjustments to the ride height when it changed so you didn't need to. Now, everything is up to you. This means you are constantly moving, constantly sheeting and constantly steering. The key to this game is to stop thinking about trimming your sails in a conventional way. The sails are your height control. Load the sails (pull in) and this loads the foils and the boat reduces ride height. Ease the sails and the foils unload and ride height increases. That's the basics. So consider sailing with the kite up. Should you be sheeting for proper airflow and power, or should you be sheeting to control the amount of load on the foils and therefore the ride height. The simple answer is the latter, while the long answer is that it is the latter combined with walking the gunwale and steering. But that's getting into advanced territory. To start with, practice ride height control through sail loading (assuming you are standing in about the right place). Once you get the hang of that, combine it with walking the side so that you can reduce the amount of sheeting a bit and maintain as good flow over all the sails as possible and finally, combine it with steering.
  8. 2 points
    A little knowledge is a dangerous thing. There is a reason why some say that CFD actually stands for "Colours for Directors". It's because those with knowledge can produce pretty coloured pictures and use them to convince people (directors with large budgets) of anything based on an interpretation of those pictures. I get asked by my clients how do they know that the pictures I show them are real and prove what I say they do (sorry, forgot to say I use CFD to model both air and temperature flows). I first modelled a cat design in CFD a year before the AC72 design rule was announced, but I admit that was taking an existing design (an A Class Flyer 1) to look at a few issues, rather than starting from scratch. You say that Oracle had an advantage over everybody else with the cat. I call bullshit on that. Let's start with the platform which is where all designs would start. You seem to have forgotten that in the previous cycle, Alinghi had designed and built a big cat, while Oracle built a tri (and yes, Alinghi did use CFD). On that basis alone, there was clearly at least one design team who would have been ahead of Oracle. However, there were a reasonable number of other design teams who had significantly more experience of designing cats in cfd than Oracle, such as Nigel Irens and VPLP (who designed the Oracle tri because Oracle didn't have the design experience). Designing large racing cats was not a new art. In fact, ETNZ employed a number of highly experienced large cat designers, including those who wrote the AC72 rule. I always thought that it was either very fair or stupid that Oracle didn't tie up M&M but instead, left them to take all their knowledge to another team. The same is true when it comes to wing sails. The Oracle DoG wing was a very unsophisticated, non state of the art design. It was built in a very short timeframe with a very short design phase and it was over engineered because they needed to play it safe. They knew and admitted this. While the size was huge and that hadn't been done before, it was not at all ground breaking. There were a lot of people who could have designed that wing both from the aerodynamic and structural viewpoint. Way before Oracle came out with the wing, I had drawings and specifications for a far more sophisticated wing rig, a design that formed the basis of the AC72 rig of ETNZ. Again, ETNZ employed designers who had experience of advanced wing rigs and I believe that the ETNZ wings were ahead of the others in their aerodynamics because of that experience (I think they stuffed up the control systems and made it too heavy, but that's another story). Because of well know and understood scaling factors (look up Reynolds numbers), the size was never a major factor in the aerodynamic design of the AC72 wings. Overall, loads and performance predictions for the AC72 could be made based on existing predictive software which was well proven and verified against real performance data. In short, there were a significant number of people who had the design experience of both cats and wing rigs. Now we look at the new AC75. This was a totally new type of boat, both in hull/platform terms and in rig terms. As you rightly point out, you cannot use predictive software optimised for a maxi on a cat, or in this case, you cannot use anything that existed. Teams had to start working on their predictive software from scratch. Because nobody had any real world experience of the boats to check their modelling against, they needed to run huge multiples of simulations and check the data against changes made to see if the changes predicted match the results produced. This iterative process is takes time - the more time you have before needing to commit to your first design, the more virtual tests and more iterations you can do. ETNZ had a huge head start that was impossible to catch up, because all teams would have had a very similar "drop dead" date for the design of the first boat. As an aside, most top design teams these days have developed their own proprietary code for performance prediction. That code is a source of competitive advantage. That code is being constantly refined and many would find it surprising what some are doing to validate their models. For instance, one of the top design teams uses the A Class for this purpose, which is why we have seen so many different foils going through development. At last year's worlds, the production main foil was iteration 27 and I have lost count of how many rudder winglets we have tried. Despite the size difference, the results from the models and from real life testing on the A's at 18' long and 75 kgs are completely relevant to foiling boats 5 times bigger and many times heavier. That's why those designers spend so much time looking at A's (plus they are unreal fun to sail!)
  9. 2 points
    No difference. But a half-season old Mk II will likely perform better than a half-season old Mk I. I think they did a very good job in having the Mk II be more durable but not faster.
  10. 2 points
  11. 2 points
    Paul Larson interview with cool new details and Paul waving around chunks of foil. https://sailinganarchy.com/2020/10/09/rocket-man-2/
  12. 2 points
    We just send the twins in to the rating review board meeting. No paperwork needed except sail number and they get whatever they ask for. Luckily the do not have a dress code at the YC they hold the meetings at.
  13. 2 points
    Sorry to hear Mali Unless there are other issues involved, your Sis should be physically OK a day or two after her surgery. Physically speaking, it's not a massive procedure. So don't hold back any information out of worry for your Sis. Don't expose yourself to any recriminations later, let her know everything, and make her own decisions. I'm in a slightly similar position, with my Mum in hospital in another state. In normal times I'd go visit to help out, but at the moment I have to recognise that everyone is coping without me. Suspect your sister will come to the same conclusion, and should be thankful for you giving her all the info. I'd give her a quick call - perhaps when you only have 5 mins to talk, so it gives you a hard stop to the conversation ie a way to end it politely. It may be hard, but it avoids recriminations and second guessing later.
  14. 2 points
    Based on what it says in the article, boats will get 10 different ratings under this system. Does the RC or OA pick the one they use, or does the skipper? What if the wind starts out at 20 knots until the first boat finishes and then goes to 4 knots for the rest of the fleet? Do you use the rating for an average wind speed 12 knots? 8 knots? Is the rating selected before the race, or can you wait until after? Do they allow ToT since the slower boats, are going to take a LOT longer in 4 knots of breeze? Perhaps the RC can figure that there are 20 slow boats and only one fast one, so the rating for light conditions prevails, since that makes the race fairer for the most boats? Applying 10 different ratings sure sounds exciting, and so much more exact, precise, and scientific than one.
  15. 2 points
    No. Theres a clear rule and a clear Case 129. Dont mess with it. Just finsh between the damn mark an the S flag.
  16. 2 points
    We burn about two and a half cords each winter. I buy split wood from our arborist. It seasons in a pile for a year then goes into the wood shed in early summer. Nothing wrong with cutting and splitting yourself but there’s only so much time. I’m convinced that having a fire wards off seasonal mood issues. Our particular wood heater is a Finnish design.
  17. 2 points
  18. 2 points
    because most people can remember what country they live in without the constant reminder flags on houses are stupid
  19. 2 points
    Or maybe he's in some basement accessible only by a trap door hidden under a rug meeting with fellow militia members of a rogue group named after some comic book hero. #wolverinewatchmen Last heard, he had some serious family issues that were motivating him to re-allocate his time. I hope he's playing some tasty guitar riffs and spending quality time with kith & kin. - DSK
  20. 2 points
    needless to say... there is a video and the derivation of the weird name for a sandwhich the tank corps are particularly fond of them you can cook them on a hot muffler
  21. 2 points
    Call your sister. Genuinely focus on her, how she's feeling, how she's taking this, etc. When she asks about your mom, be honest. But *call your sister*. Better to call her than agonize over it.
  22. 2 points
    The Ruby Princess clusterfuck, as bad as it was, isn't even in the same league as what this arrogant power hungry piece of shit has done, or actually failed to do.
  23. 2 points
    Not true, you can do a foil peel without tacking. Step by step instructions
  24. 2 points
    Firstly get some Eucalyptus Oil. I don't know if you can get it in the US but it's easy to get here (Australia) and pour a liberal amount into each cylinder. Let stand for a week or so. Next remove the injector from whichever cylinder is on the firing stroke i.e. both valves closed. Modify the injector so you can screw or weld a grease nipple into it. Pack you grease gun with a cheap marine grease and proceed to pump that cylinder with grease. Even a cheap grease gun will produce around 4000 psi so if the pressure of that won't shift the piston then nothing short of destruction will. You're welcome D.o.B 1955
  25. 2 points
    An intentional choice, by which I hoped to communicate that the land itself is party agnostic. I understand that there are many beautiful vistas in many countries, and that there are terrible vistas here and away. But today, my personal focus is domestic because so much of the recent conversation here is domestic. We all have so much more in common than we do in conflict. I feel like I'm watching a dispute about whats for dinner turn into a mass decision to burn the house down. Pizza or burgers, we need a bed to sleep in at the end of the day. The inter-party warfare has turned us against each other at a level that is self-defeating. It is possible to share to work, while still preserving the ability to disagree and work to foment change. I am afraid that our self importance and the expression of our anxieties as personal attacks will mean only that our governing class continues to eat, while we starve. For me, remembering that whatever we do that moon will rise, over us or over desolation, helps me keep my pride in check.

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