RobG

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Everything posted by RobG

  1. RobG

    Sarah Huckabee kicked out of restaurant

    What an absurd statement. When a child lies, do you think it's OK to respond with violence? Politicians regularly tell lies and untruths. Pointing out those lies and bringing the politicians to account is the job of the media and news organisations. It's not the responsibility of individual citizens to respond with violence. What seems to be missing is a sense of rationality. If the restauranter had refused Ms Sanders entry to their home or similar setting on moral grounds, that's fine. But as a business owner serving the public, refusing service to someone based on personal beliefs is not ethical.
  2. RobG

    Yet another foiler

    It seems to be more like USD20,400 with shipping, plus another USD1,800 for the graphic on the side. http://www.quant-boats.com/media/pdf/74/cf/97/SKEETA_Bootsbeschreibung_Preisliste_20042018.pdf Has anyone bought one? Seen one sailing? Pix? I think it's a great idea, but the price is a bit much.
  3. RobG

    Sarah Huckabee kicked out of restaurant

    Dunno about the US, but where I live discriminating against someone on the basis of political belief (and many other criteria such as race, religious belief, sexual identity, etc.) is illegal and no one is trying to change that. This action is also a direct attack on free speech. To those who support this action, do you now think it's OK for republican business owners to refuse to serve anyone who holds non–republican views?
  4. Use the force… or a bit of air guitar… Nice bit of 'shopping. Looks cool to me, right up there with the scow mini 650s.
  5. RobG

    Gonet Monofoil

    It has been covered elsewhere, e.g. Pressure Drop, YachtBoatNews and Sail–World. CNN reported that the boat is 850kg including 4 crew (caption to 3rd image here), so maybe it's around 530 kg (allowing 80kg/crew member), which is still heavy for a foiler and 75% more than a Quant 23. Sail-World says it's 850kg empty. I guess we'll find out the truth in time. Here's the facebook page, there's a video showing a fairly minimal bulb.
  6. You've got it backwards. At pre–foiling speeds, they will be able to generate all the RM they need by canting the leeward foil outward. Once foiling and the leeward foil has maxed its RM contribution, then it makes sense to look at adding RM from the windward foil. I agree with Phil, these will likely be sailed flat, there's no reason to heel to windward. Moths and sailboards must heel to windward, it's a physical impossibility not to (except when going downwind or in very light conditions).
  7. RobG

    trickle down

    I'm thinking more like how wing masts are treated. They're seen as an enhancement where the pros and cons are considered and not every wing mast has to be at the absolute bleeding edge. Foils seem to be the opposite: every system is judged by how close it is to the extreme limit of potential rather than a balance of overall benefit (there must be some sailing equivalent to the business triple bottom line). That the Vampire has to change boards so radically for conditions I think proves the point, though perhaps it's no different to (and probably no more popular than) skiffs that have two or three rigs rather than a reefing main. I think only 12, 16 and 18 footers allow it and how numerous are they?
  8. RobG

    trickle down

    Even as an ex–Mothie, I still think contraptions like swing–up foils and wands look like overly complex kludges. There is a simplicity to J and Z foils that is lacking in most other approaches that rely on one or more active mechanical, hydraulic or electrical systems that are at lest partially, if not wholly, automated. I don't see a system like the Vampire as evolution of the Moth T/wand system, more a bastardisation of it. If Z foils had been allowed per the Burvile/Pivac Moth and had Moth foils developed similarly to the A Class (but without the inset–from–the–top restriction), I wonder if T foils would have their current status. While the AC50 Class L foils required sophisticated automation and hydraulic systems, they seemed to be developing in a way that simpler versions could be adopted for less bleeding edge applications, i.e. they might actually trickle down, but not widely. I can't see the Vampire system being any more widely adopted than centreline T foils on monohulls have been.
  9. Nothing to add to the above other than encouragement. 9 to 11 kn is perfect for learning. To begin with, you need to move, sheet or steer to compensate for the slightest roll of the boat to keep it upright. After awhile, it will become natural and you can relax a bit. If you haven't come from a skiff background, you're likely used to hull buoyancy helping to keep the boat upright. There is zero such assistance on a Moth, noodles and bladders just help a little bit, they are not reserve buoyancy or anything like outriggers or floats. The only thing keeping the boat upright is you! Oh, one tip: when climbing onto the centreboard, be careful of where you put the elbow of your arm closest to the hull. It's very easy to put it on the side of the hull and put your weight on your elbow to help getting onto the board. Every time you do, you'll likely put a dent in your boat (the little bone on the inside of your elbow, the medial epicondyle, will probably get bruised too, but it fixes itself). Put your arm up near the gunwale/wing root with your weight on your hand, it's a little more awkward but will keep your boat looking much nicer. ;-)
  10. RobG

    Building a Foiling Beach Catamaran

    Try the multi-hull forum. They won't be able to help either, but I'm sure they'd like to watch the train wreck that's about to happen… If you want a cheap DIY catamaran with good performance, you could do worse than an Arrow.
  11. RobG

    Banque Pop capsize

    Apparently it was lost the day before the capsize.
  12. RobG

    Yet another foiler

    A lot of Bladeriders and Mach2s get lapped too. ;-) A bit more experience with sail trim (that main is sooo twisted) and sailing technique and I think it would look a lot better. If they can build it to the right price (which means it would have to be a one–design), it would fit nicely in the UFO/WASZP space. It's really not that hard to heave–to in a Moth, just ease the main and sail slightly off head–to–wind. Watch for shifts though. And there is always capsize and sit on the centreboard. There's no off button when upright, but that's the same with pretty much any modern skiff.
  13. RobG

    Banque Pop capsize

    Where did the central foil go? It seems to have been missing before the boat reached the wharf. They seem to have salvaged a lot of the rig, so may be it was removed while still at sea?
  14. Sailboards have the rig heeled to windward, but from what I've seen, foiling boards seem to sail fairly flat, they aren't heeling the foil. It's nothing to do with needing the board to be flat to generate lift: if more lift is required, they can increase the AoA through weight redistribution (and likely sail trim). I think sailing with the foil heeled takes more skill though, as the strut also starts to provide vertical lift so steering inputs change the lift, so more variables in the mix. It's an old trick on Moths when falling in to windward and you're already fully sheeted on, bearing away sharply helps to lift you back up.
  15. "Wrong way" in the context of an AC75 perhaps. Watch the video, the guy is trying to sail straight, not gybing. After watching many videos (not many foiling sailboards round here), I was surprised at just how flat the boards/foils are sailed, even thought the rig is canted to windward. I was more drawn by the tip of the foil breaking the surface. I'm just not convinced that it promotes ventilation anywhere near as much as suggested. The strut is far more likely to be the cause (other than just sailing out of the water).
  16. Something like this (video):
  17. The video doesn't show that: ventilation starts at the surface and moves down, it doesn't start at the vortex of the (submerged) tip. A tip breaching the surface (or going very close) may induce ventilation, and vortexes may have an influence on that but that isn't what the video shows. Moth main foil tips occasionally pierce the surface due to windward heel, it doesn't seem to induce ventilation (speeds around 15 kn I guess).
  18. RobG

    Foilers: brushing off seaweeds?

    What type of foils?
  19. But it's extremely unlikely they'll race at such speeds. While in the docking position, if the foil produces any lift at all, there will be a significant vector to leeward unless the foils can be trimmed for zero lift and minimum drag simultaneously. However it doesn't seem sensible to design for that scenario given the likely tradeoff in other areas and very low chance it will occur in racing. Where's the fallacy? 9kns TWS might have variations of perhaps ±3kn. I think the point is that if they can get foiling in a puff of say 11 or 12kn, they may be able to sustain it.
  20. RobG

    AC36 CLASS RULE

    Paraphrasing should be shorter… ;-) I guess you could use nunchucks/nunchaku or bull whips too, but what control are they going to operate?
  21. RobG

    AC36 CLASS RULE

    Fixed it for you. Unless you know of rowing machines that can be described as "grinding pedestals or winches that are operated by turning handles in a rotary motion with the hands."
  22. RobG

    AC36 CLASS RULE

    The rule requires symmetry, so winglets on both tips should comply. If they're used at all I think they'll be very small. I can't see a "rigid coupling between leeway and heeling" when the foils can be canted independently of heel, adjusting the vertical/horizontal lift vectors as desired. A more general question: if 3 dimensional X,Y,Z axises are applied to the AC75, which directions do they align with? Is X fore/aft, Y port/starboard and Z vertical?
  23. Be careful what you wish for. A focus on Olympic medals can mean that everything is seen through the lens of Olympic classes. So if you want sponsored coaching and support, you must sail an Olympic class. That usually means sailing where those classes are sailed, so offshore for USA and AUS with little trickle down to local sailing. I've sailed in a fleet with many Olympic sailors (with me at the very tail end of the fleet), but not in an Olympic class.
  24. RobG

    AC36 CLASS RULE

    There you go, dragging this thing kicking and screaming back on topic… The target for the AC75s must be continuous foiling, anything less will be a large backward step. Deathly silence on progress though…
  25. Aus will only send people to the Olympics if they're a medal chance. For sailing, that means you must be a top 10 world ranking, it's very strictly applied. Govt. funding is crap, enough to attend one overseas regatta per year. Anyone serious about selection must spend a lot of the year overseas competing, so needs a lot of financial backing ($200k to $300k at least). No wonder swimming hopefuls are a lot easier to recruit.