• Announcements

    • Zapata

      Abbreviated rules   07/28/2017

      Underdawg did an excellent job of explaining the rules.  Here's the simplified version: Don't insinuate Pedo.  Warning and or timeout for a first offense.  PermaFlick for any subsequent offenses Don't out members.  See above for penalties.  Caveat:  if you have ever used your own real name or personal information here on the forums since, like, ever - it doesn't count and you are fair game. If you see spam posts, report it to the mods.  We do not hang out in every thread 24/7 If you see any of the above, report it to the mods by hitting the Report button in the offending post.   We do not take action for foul language, off-subject content, or abusive behavior unless it escalates to persistent stalking.  There may be times that we might warn someone or flick someone for something particularly egregious.  There is no standard, we will know it when we see it.  If you continually report things that do not fall into rules #1 or 2 above, you may very well get a timeout yourself for annoying the Mods with repeated whining.  Use your best judgement. Warnings, timeouts, suspensions and flicks are arbitrary and capricious.  Deal with it.  Welcome to anarchy.   If you are a newbie, there are unwritten rules to adhere to.  They will be explained to you soon enough.  

Groucho Marx

Members
  • Content count

    552
  • Joined

  • Last visited

About Groucho Marx

  • Rank
    Anarchist

Profile Information

  • Location
    auckland, nz
  • Interests
    varied

Recent Profile Visitors

1,875 profile views
  1. IF these fantastical monster (and over-the-top expensive; remember the hypocritical whinging regarding AC50s) if these boats are to have deep draft keels or maybe canting? versions, these last Century throwbacks will be sailing way the hell out from East Coast Bays? Yeah, right, way to go for the viewing public ... has to be a success? This mess geared for the old brigade is totally fornicated from the very start?
  2. That second proa you've designed is interesting Rob, maybe beyond interesting, flying the windward float at rest? Rob, the other one, Denney might be a little miffed by you stealing his steam?
  3. Next AC boat will be a return to the dark ages, even with Guillaume Verdier designing it. But the mono advocates are very gleeful and full of gloating with the change from "them multicocks." to proper boats. But most enlightened people see it as a retrograde step and actually pretty stupid one; like how are they going to rotate the heavy swing keels without a stinker. Correct, Sid is no offshore boat, never was intended to be, just a fun foiler harbour sailer. However the boat has handled some savage wind against tide conditions and has held up well. Here is the prototype Flash Harry.
  4. Fair enough. Back in the old days (talking late 1970s early '80s) when Malcolm Tennant designed the Bamboo Bomber and Great Barrier Express, first of the open wing deck larger cats in New Zealand with rotating mast and with a wing on the Bomber, common knowledge among the so avant garde Kiwi radicals (joking) was to have no shape in main, flat is what you needed because in those days, using heavy Dacron, it was going to stretch and bag when the apparent wind climbed high anyway. You used mast rotation to flatten or gain fullness. Guess I've never questioned those pearls of wisdom since those times - and could be completely wrong..
  5. Okay, more weight because of pulleys, like on Sid, maybe 1 kgs at most with today's light blocks ... and you can pivot and also quickly tension the rig. Take your choice. More vertical pull on chainplates and control system and mast pivot - something I have never noticed or had breakages from. My chain plates are glass and carbon tows around thimbles, have never had breakage problems, also lighter and stronger than metal. And if you are sailing faster you do not need extra sail area, on the contrary, you need less. Win, win, all around?
  6. Agreed, it doesn't - and if you have angled foils and T rudder, there is also less drag and loads on platform because, aside from sailing faster, it is lifting the boat higher from waves and water drag. An inverted T rudder also reduces pitching and stern dragging (and turbulence over rig).- many people do not seem to be able to comprehend this basic fact.
  7. There is a large difference between a slotted AC full wing and "conventional" wing mast and soft sail - and the slot or slots on some full wings are around 50% aft of mast leading edge (and sometimes. like in the Australian Cs and others, a third slot near the trailing edge, like a flap) and there also is a large difference in that the second and third elements can move athwartships to increase airfow which retains attachment between the elements, increasing lift - all very sophisticated and very impressive - but for an old world wing mast/soft sail (but not as old world as draggy fixed mast and sail) the emphasis is to reduce drag, increase lift ... and the system works okay. When on such a rig the sail is made flat, it does not stay flat at speed; there is an even curve. Remember the wing mast establishes the smooth to leeward curve from LEADING edge to soft sail leech. Yes, yes. the cunningham is not set up correctly but this is a light airs photograph and I had to crawl to leeward to take shot, boat is sailing itself. Also you can't see the amount of mast rotation; it is further angled than what it appears here because you can only see the trailing section of mast..
  8. I just asked Booboo Tucker (an expert from Norths) to make it flat and that is what they produced ... and it is flat. Wing mast has half a metre chord, so there is your shape; the curve of the foil on leeward side to sail. Here's an old shot of my old and way overloaded catamaran sailing on a broad reach, check out the amount of mast rotation and fairing to leeward of mast/sail. Sail was Boyd and McMaster and it was also completely flat.
  9. Main is cut completely flat, no shape. To get some fullness you adjust the mast rotation, allow more angle. In heavier wind you can reduce spanner rotation but it is best to reef. Above 14 knot WS with full main, boat is overloaded; goes faster reefed. Sid is very light, doesn't need much sail for speed.
  10. Reds under the bed and other defecation (as usual) pouring from your large head orifice, Jaysper?
  11. It has now gone beyond sad with Lord of Fools. We're dealing with a deranged, deluded and extreme fantasist mind here. His raison d'etre are his silly toys ... so we should keep that in mind. Remove his dreamy fantasies by attempting logic ... he might implode. This bloke is a special kind of bonkers.
  12. Uncivilized, you can see the rudder setup in this shot. It is old time lift concept like Uffa Fox's Flying 15 the only difference being that there is a T foil at blade tip ... so you can't remove it unless you go for a swim and pull it down underwater. The other transom slot aft is for a shallow water blade rudder, no T foil - since removed and filled in. The upper main rudder case and tiller fittings are same width as case, so you can push rudder down through case for removal. The yellow and red lines are mast runners. Yes, mast can be canted with block and tackle shroud set ups.
  13. AYRS, Amateur Yacht Research Society, started publishing in the late 1950s and there are numbers of issues related to foil design ... and every foil imaginable is published there including V,inverted T, L, angled out, angled in, up tip and down varieties and many others from the inventive types posting in those times. Repeat: that was late 1950s and early '60s. And now we have this Lord of Fools (not Foils), a latter day copyist and imposter trumpeting (endlessly and repeatedly) his insufferable self proclaimed inventor successes? (delusions). One should have sympathy .... ?
  14. Good thinking Jethrow and that is another solution to sailing at anchor problems - but in high winds that is quite a lot of windage and drag. My masts have 500mm chord - a fairly large area to turn sideways to wind. If the main dagger and rudder are lifted, the boats are docile moored.
  15. In high winds with all sail down you must not lock the wing mast fore and aft, that is dangerous, just imo, and if the wind is screeching, there will be enough area to put you in a potentially vicious defecating moment ... but also the mast must not be allowed to flap, that is also dangerous - so if beating it is cleated off at say, around 30 degrees, same for reaching or running off with the mast rotated around 45-60 degrees. You can spill power of the wing mast by feathering or easing the spanner. .But in high winds you need powerful control on both spanner lines ... which means multiple purchases and good cleats. We once got caught off Moehau in very savage catabatic winds and ran for shelter under mast averaging 17 knots for half an hour. A wing mast plus is that there is no sail flogging noise or distortion. If moored, the mast must be locked fore and aft and all daggers/foils/rudders lifted, especially so in high winds - so the platform skids and weathercocks. If any of these are down you will sail like a banshee, hit the end of your mooring or anchor warps, halt savagely and capsize. Steinlager had a very large 1.5 metre chord wing mast but the stays went to the mast sides and not to leading edge with the forestay ... therefore they couldn't spill power, mast would only rotate 30 odd degrees (see photograph) before the rigging locked up.