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david r

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Posts posted by david r

  1. The way i remember the past is that the Tornado came out first in the late 60's, taking the fastest production sailboat honor from the Shark (also 20x10).  My first crewing gig was on a Tornado 1968. The hobie 14 came out also late 60s.  Tornado wasn't used much in the Worrell since it isn't good to run up on the beach at full speed because of the centerboard gaskets for one thing.

    There was a 10m foot wide alfa cat from the guys that made nacras before the 5.2 came out.  The 5.2 being more like a tornado as an answer to the popular hobie 16.  we destroyed the naca 5.2 fleet in sfo multihull championships with a hobie 18 in the late 70s.  Also beat a bunch of 5.2s with an gcat 5.0 in hurricane gulch earlyn 80s.

    Prindle with Richard Loufec made the 19 as a tornado training boat- very similar hulls, crappy centerboards, but a bigger rig.  Smyth and others put a asy on the 19 and won the Worrell.  There were 2 -19s and some nacra 5.8s all with asy rigs that year.  The asy was rigged off the leeward bow in the beginning.  I raced 1 of of the 2 boats in the fleet w/o a spi. and got crushed.  I later realized that if we had tipped over with that front tramp on, we would not have been able to get back on the boat very easily after re-righting.  A very dangerous situ.

    The worrell was started on H16s by Mike Worrell, and was non stop in the beginning.  The race lasted for nearly a decade on regular hobie 16s, IRRC.

  2. It's possible that Prada boat was made 10%  faster before they took on AM the last time, just like they said.  They seemed to pull away downwind in the last couple heats.  Also the mainsails might be faster on Prada.

  3. electronics on a wet boat...most of the AC foiling heats and other foiling heats with coms, that i have watched had at least one boat having problems with an electrical component...

    sometimes it's intermittent, sometimes it ends the heat for them, sometimes they loose because of it, but still finish.

    it seems to be part of the game many times.

    Ineos didn't seem to know where the boundaries were in the previous heat for example.

    p,s, great job getting that boat back to port with that size of hole in it.

  4. I saw them pull the traveler up to windward right after they lifted the foil after a tack.  almost like pumping after a tack on a board.  I wondered if maybe they could also pump a little more sometimes in the lighter puffs.

    the cats also pulled the wing past center a lot, so it must be  good for some things.

  5. They used claim catamarans started in bora bora.  Now i dont see a reference to that in a search.   Searching is difficult these days because of all the info and advertisements using similar terms.  This site claims that brits first saw them in india.  https://www.newworldencyclopedia.org/entry/Catamaran

    this one, Polynesia.   https://encyclopedia2.thefreedictionary.com/Catamaran+History

    The first voyaging canoes with twin hulls were Polynesian and they could make ground to windward.  during the same time period, old square riggers from europe could not go above a beam reach very well.  the went downwind with the trades and waited for the wind to shift the other way to get home, or at least that is what teachers said in school.  It is possible that the voyaging canoes were invented long before square riggers.

    ps. the ndl says you need to be white to be racist...that seems racist to me XD

    • Like 1
  6. It makes sense that the flow from the windward side meeting the leeward side aft of the leech would be less drag than if they, the air flows, met right at the leech.  (gap between leechs vs. no gap)

    i wonder if full wing mast/sail as on the cats should be made with a fat squared off trailing edge as well?  or maybe they were?

  7. A big mast like that with uppers and lowers that rotates is a bit of a puzzle.  I wonder when they will show how that works, if ever.  The twist controls must be interesting too.  Maybe they had a problem in one of those areas...

  8. Leeway.  Anyone mention that?

    Even if a sailboat could regularly point up to 30 degrees, which i seriously doubt, they maybe won't tack on 60 degrees because of leeway.  That means they would go past the 60 degree layline before tacking.  Leeway will affect VMG, as does the bearing off to pick up speed to then gain height.

    My apologies if that is too obvious.

    • Like 1
  9. lol, 30 degrees to the wind as a regular upwind sailing angle.

    where did you get that phd of sailing?  maybe from your smack dealer.

    They seem to point pretty high at times, but 30 degrees would be too high for a sailboat on a regular basis.

    Some of the video looks like they are lower than 45 degrees.

  10. Some of the most coveted info would be pointing angle/downwind angle when powered up.  Having access to that on a public forum at this juncture would not make much sense, considering the teams probably only know their own data so far.

    Maybe fast and low downwind will win the race.

  11. If you are on an island, and no one can go there with out a 2 week isolation, how could an outbreak start?

    If it did, that would mean they don't know how it, the "virus" travels/works...

    Alternatively, if you are on an island with no cases of a virus, why would you need to social distance and wear a mask?

  12. "dumpster fire"  lol

    the shutdown is giving more time to foil, surf, sail, and test around here.  ppl are getting better and better on foil boards, using faster and faster foil profiles.

    NZ will probably just isolate new ppl to their island for a couple weeks when they show up to race.

    The boats are a cool but weird combo of electric and sail.  Should be an interesting event, barring some type of world war.  Although even during a world war

    some rich ppl still enjoy life.

    my opinion is that probably, if a team has a competitive boat, they will still be outsailed by the kiwis who are really good at foiling....time will tell

     

  13. Hill and Knowlton advertising firm has been hired by the WHO to sell you on the pandemic story. That is the same firm that sold you the fake story about throwing babies out of incubators, supporting the invasion of Iraq.  https://www.corbettreport.com/who-cares-what-celebrities-think-propagandawatch/

    A virus is a microscopic particle.  So small that it can't be photographed.  It is not alive.  The germ/bacteria theory does not apply.  Something that was never alive can not live on a surface for 20 minutes, but you could find plenty of bacteria on your face diaper.

    • Downvote 1
  14. Foam sandwich is how many beach cats are built.  That means there is glass on both sides of the foam.  Only glueing one side back is not going to work very well if both sides are delammed.  It's a blind operation if you don't cut a section out and look in there first.

    corecell is a good core ,it is sort of half way between airex and divinicell/cledgecell.  typically the skins are glued on the foam using  vacuum bag technology.  the early hobies used surfboard type sheet foam which later could turn to powder.  They switched to a better foam like divinicell in the 80's.  Idk what they use these days.

  15. i wrote blind injection of resin because you can't see where it is going.  you dont really know if only 1 skin is delammed or both top and bottom without cutting a section out and inspecting it.  If you shoot resin in there you don't really know where it is going and you might be making a mess and adding weight to the boat.

    gelcoat is sprayed fairly liberally when they build a boat that way, and sanding with 600 or higher grit should not go through into the glass.  Sometimes you can bring the shine back with just compound and a buffer, or liquid products for fiberglass.  If you paint with a color that doesnt match the gelcoat, any little scratch will stand out.

  16. Hi, thread is a little old but i have a couple comments.

    Those hulls look ok to just fine sand and buff out.  A painted finish is not going to look good when it gets scratched up at the beach.  If your are trying to lighten the boat weight you could sand all the gelcoat off and paint with 3 part polyurethane.  Gel coat on a repair is for a color match.  Gelcoat is a product that is sprayed into a female mold.  The side that is blocked from the air fully cures and the side that you will apply the laminate to remains tacky.  On a repair they spray pva on the gelcoat to get the outside to fully cure.  It would be a real shitfight to gelcoat an entire hull after it is out of the mold.

    Blindly injecting epoxy into a delam is a good way to gain a lot of weight , and it may or may not yield lasting results.  Carefully cutting out a section of deck and getting a good look at the delam might be a better idea.  You could maybe glue that piece back in with thickened epoxy or install a hatch/cover.  You can figure out the best way to proceed once you can look around in there.

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