MultiThom

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About MultiThom

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    Super Anarchist
  • Birthday 07/10/1950

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    https://groups.google.com/forum/#!forum/searail-19-trimaran
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    tpdavis@yahoo.com

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  • Location
    Benicia, CA
  • Interests
    Trimaran sailing; sailmaking; boat rigging; SeaRail 19 Trimaran Google Group

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  1. MultiThom

    corsair or dragon fly pro's and con

    Made similar decisions. A bit more than 500 pounds and a bit longer than 15'. Faster than the F24 I used to drive but easier with no winches on the boat at all. But, also not as sturdy nor as well supported as either Corsair or DF boats. Don't have to trailer sail, but choose to because I like to play with the boat while on the trailer and in the side yard Just For Fun.
  2. MultiThom

    Ideas?

    My F242 came with a built in bumper on the ama noses. Since I broke one I saw how they were made and attached. Essentially they were a thin fiberglass shell with an interior of carved foam and attached using sikaflex bedding compound. You should be able to easily make one perfectly by applying some thin plastic (release) over the bow, spray some expanding foam (great stuff) on the nose and let it harden. Carve the outside how you want it to look. Add epoxy/glass and paint. Release from the bow, apply sikaflex to glom back on.
  3. MultiThom

    corsair or dragon fly pro's and con

    What is cool about the Farrier/Corsair boats is that the width folded is variable. What we did after motoring into the slip is to pull the ama's out to the sides so the boat exactly fits the width of the slip (with fenders of course). What happens is that the sides of the floats are no longer in contact with the water so the fouling is minimal. Can keep it that way for several days without bottom paint--longer if you have bottom paint. Every Thursday during daylight savings time the local yacht club had beercan races and they let trimarans play. So, every Thursday I launched (often by myself) for the 6 PM start gun and then after the sail hauled it out and lowered the mast and trailered to the club for "lies and libations". Call it 25 mast raisings/lowerings for 5 years. So, I really don't think you can claim that "you just won't bother for a 3 hour daysail". Many Fboaters can get from trailer to sailing in a half hour or less (takes practice).
  4. MultiThom

    Gyrocopter

    Yah. Simple logic for simplistic minds. Especially suited for people who can't read a second and third sentence explaining the first.
  5. MultiThom

    Gyrocopter

    A local guy built one, sailed it for a couple years and now is making a trimaran instead. Must have some flaws he couldn't get past. I think it might have been too wet a ride with bigger wind if I recall correctly and too long to set up/take down (trailer sailor).
  6. MultiThom

    Sheeting Angle for Performance Tris

    I had similar issues with main halyards (especially uncovered halyards). I inserted a bulk (small diameter line cover) into the core where it goes through the clutch. Held much better. Often had to retighten jib halyard using cabintop winch after sailing a while (just like mainsail halyard). Also, on some small boats (eg weta), some folks use a cunningham on the halyard above the clutch to give 2:1.
  7. MultiThom

    Sheeting Angle for Performance Tris

    When I've seen those symptoms together I have sometimes found that the jib halyard is not sufficiently tight.
  8. MultiThom

    Sheeting Angle for Performance Tris

    Work with inhauls before moving tracks. The roachy jib may need a bigger slot than you are used to. Have you noticed any backwind bubbles in the lee main in bigger breeze?
  9. MultiThom

    Gyrocopter

    Smaller ones don't move the mast, so it is quicker on those; but couldn't find a vid of a 30 footer doing it. Your figures are likely to be close. For the times I screw up a tack, it does probably waste about as much time/effort as shunting since i let it back up and rudder it over to complete the tack. Point being, every shunt on a proa is like a screwed up tack to a trimaran--who wants that?
  10. MultiThom

    Gyrocopter

    Watch a shunt on a big boat in real time.
  11. MultiThom

    Sheeting Angle for Performance Tris

    Most blade jibs have a hollow built into the leach (to control leach flutter without use of leach tensioning lines-at least when jib is new). Sailmakers who build jibs for rotating masts often take the spreader location into account and put the maximum hollow at that height. Good crew use the leach offset from the spreader as the time to stop grinding. My current boat has self tacker. I have noted that pointing and speed suffer if the car is allowed too far outboard (car leash broke during a sail). I've also noted that car position athwartships must change with wind speed, lighter breezes with less slot gap. Consequently, I believe your tracks should angle out fore to aft so cars forward (no twist-light air) has less slot than cars aft (lots of twist, heavy air).
  12. MultiThom

    Gyrocopter

    Well, I can do that in my tri (DDW wing and wing if I need to); but your boat Must do that all the time; I like choices when having fun. Don't get me wrong, horses for courses; I'd never sail my tri in the ocean for a passage making, mine is a day sailor and that's what I like to do. You folks who like to cross oceans could choose a proa since that is what they are good for. If a proa could tack (and some can like the ninja and some of them with moveable amas/sliding akas), then it might be a more fun ride, but shunting is anathema if you have to do it against a 2 kt current in a 5 kt breeze--you will literally never get where you want to go. Might as well stay in the marina and wait for the current to go the other way. Point is, though, sailing for fun means you can sail in all conditions whenever the muse hits. Y'know this thread is sort of silly. Boats are either tools (most are motored-submarines, tugboats, tankers, fishing boat...); transportation (proas, big catamarans, big tris...), or recreation (toys--smaller tris and cats...); or accommodations (yachts, condomarans...). Some can do more than one thing, but rarely will they do all those things as well as something designed specifically to do one thing well. My tri is a toy--not meant to do anything else and it does that one thing very well. Decide what you want to do with a boat and get one that does that. Life is too short to fiddle around with compromises that sorta work OK.
  13. MultiThom

    Gyrocopter

    Yep. That and it sometimes takes 30 tacks against current to go 5 miles where I sail most often. Proa is not a boat built for fun in mind.
  14. MultiThom

    Gyrocopter

    And the polar for the proa seems to say it is a pretty dull ride downwind. Best VMG is to point straight downwind. Oh well, like sailing a keelboat monohull after the upwind mark, set the chute and crack open a beer. Just another reason I don't want one (I sail for fun); but It is probably good for folks who want to cross oceans.
  15. MultiThom

    Gyrocopter