gspot

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About gspot

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    Victoria, BC

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  1. gspot

    Transducer wire ?

    I've found that most instrument manufacturers use transducers made by Airmar. So try doing a Google search for "B&G Airmar" or browse the wiring diagrams here for a colour match: https://www.gemeco.com/wiring-transducer.php Airmar also tends to re-use the same thru-hull housings so if your transducers are indeed Airmar, you may be able to fit a new unit into the legacy housing.
  2. gspot

    Gear to aid a aging sailor

    One of the biggest improvements I've made for single-handing is a midship cleat at the beamiest point on my boat, and a corresponding cleat at the adjacent point on the dock. This single line connecting the two is the last line off when leaving, and the first line back on when docking. It hugely simplifies single-handling, because even though the boat can pivot around it, the boat won't hit the neighbouring boat or otherwise go anywhere with this line attached. It doesn't replace the standard dock lines, and is actually slackened when not in use to allow for normal boat movement at the dock.
  3. gspot

    corsair or dragon fly pro's and con

    Airwick is the absolute master of trailer-sailing his F-boat, and we've modeled many of our techniques after his, although it still takes us about an hour to launch and retrieve. The key to quick launching and retrieval is to leave as much of the boat rigged as possible while on the trailer (e.g. leave the sheets rigged instead of removing them), then just cover the whole mostly-rigged boat while on the hard. Still, an hour to launch and retrieve is very similar to rigging my monohull at the dock in race mode, although that can also be shortened a bit when rigged in cruise mode (e.g. using roller furling jib). With the extra steps of unfolding there probably isn't a huge difference between launching a Dragonfly from a slip versus a well-practiced F-boat launch at the ramp. Also, there are HUGE time savings in maintenance projects by having the boat at home. My marina slip is 20 minutes away, so 40 minutes round trip without even getting any work done, while the F-boat on the trailer in my driveway is quite literally 30 seconds away from a full workshop. So saving just one maintenance trip to the marina per sailing excursion easily makes up for any difference in launch time.
  4. gspot

    corsair or dragon fly pro's and con

    It seems all the cool revolutionary thinkers get started in a garage - Jobs, Wozniak, Farrier...
  5. gspot

    Sheeting Angle for Performance Tris

    Yeah, I don't think we'll be able to emulate Randy! In the monohull world I've found that most reasonable helmspeople can steer to a 10 degree sheeting angle, so I think that's a more reasonable target. That's still about 2" / 5cm inboard of where our cars are at the moment, so should be quite doable with inhaulers.
  6. gspot

    Sheeting Angle for Performance Tris

    That has definitely been part of the challenge - the jib halyard tends to slip a couple of inches before the clutch bites. I've tried to create a pseudo-Cunningham for the jib to address this but it's still a work in progress.
  7. gspot

    Sheeting Angle for Performance Tris

    We'll definitely start with inhaulers or other temporary measures before making any permanent changes. And I haven't noticed any backwind bubbles in the main. The issue is more that the jib luffs unless we bear away to several degrees below the other boats. We still need to optimize our main shape, but I think we're getting much closer, and have also experimented with sheeting the boom slightly above centreline. As above it seems that when we get the main into a good pointing shape with slight helm pressure the jib starts luffing, and when we bear away to address that the main stalls. It's like we can't get the main and jib in sync in point mode. We also have some good photos of us and a Sprint 750 on the same point of sail, same race, same location, and the Sprint's jib is sheeted in further with less twist. But ours is already in as far as it will go.
  8. gspot

    Sheeting Angle for Performance Tris

    I just heard offline that Randy Smythe set up his boat to sheet at around 8.5 degrees, which is three degrees less than we have. It doesn't sound like much, but in absolute terms it's about 4" / 10 cm closer to the centerline, which is actually quite a difference. I will also try centering the mast. My understanding is that the rotating mast is most effective when reaching, so maybe it will be a net gain in point mode. Obviously there are other aspects of our pointing technique that will require work, but if we can get 9kn of boat speed in 12kn of breeze at 45 TWA I'd be thrilled. It should be possible based on what I've heard from other owners...
  9. gspot

    Sheeting Angle for Performance Tris

    Our blade jib is quite roachy and has battens to support the leach, which provides nice sail shape, but makes the wire clearance problem worse. The current cars do angle in towards the bow as desired, which preserves the sheeting angle, but unfortunately I think that needs to be moved inboard. Some boats (e.g. Ultimes) use low friction rings which can be positioned in three dimensions, instead of a car which moves in one dimension, so that is certainly a consideration.
  10. gspot

    Sheeting Angle for Performance Tris

    Good point on deck level vs. clew itself - I was actually referring to track position on the deck. Given that 11.5 on the deck for a blade jib is most certainly too wide! This is more in line with what I was thinking it should be, but wanted to check that there isn't something inherently different with trimarans that led the builder of my boat to go wider. The other limiting factor I've found is the diamond wires on the mast get in the way, especially when the mast is rotated, which leads to a more twisted jib than I'd like. Some have suggested moving the sheet car forward to put more camber in the sail and allow us to harden the leech a bit more. I also thought of under-rotating the mast to create more clearance but was concerned that would be counter-productive. Other thoughts other than re-cutting the sail to clear the wires?
  11. I have far more experience racing keelboats than multihulls, and am finding our F-82R to be a rocket at 40 degrees AWA or lower, but above that we're low and slow. So I took some measurements and found our jib sheeting angle to be about 11.5 degrees, and given that performance keelboats (e.g. Farr/Mumm 30, Farr 40) normally sheet at around 7 degrees, I'm wondering if our 11.5 degrees is simply too wide for efficient upwind work. I'd ask Ian if he were around, but he's not, and I don't own a Ouija board. The plans appear to show about 10 degrees but are not terribly specific. I plan to experiment with in-haulers, but just wonder what other performance tris are using for standard sheeting angles?
  12. gspot

    corsair or dragon fly pro's and con

    Depends what you value in terms of bang for the buck. If you value foldable/tailorable performance over finish, then go Corsair/Farrier. If you value foldable/tailorable refinement over pure performance, then go Dragonfly. Dollar for dollar a Corsair/Farrier will out-perform a Dragonfly, but there is no comparison in the quality of the finish. It's like comparing a Mazda Miata with a similarly sized BMW or Mercedes.
  13. gspot

    C&C 115

    Can't speak to longevity or construction, but C&C 115 "Rags" was very successfully campaigned around the PNW for a number of years, sailed well to its rating etc.
  14. gspot

    Catamaran Syndications

    I'm not a lawyer, but my understanding of common law, at least around here, is that contract terms can be both written and implied, and the behaviours and written terms can bleed together over time. For example, if the terms on paper say one thing, but everybody ignores or fails to enforce one or more of them for a period of time, those terms may turn out to be unenforceable in a court of law. That is, the courts might say "Nobody enforced this clause for the last ten years, and the actions of all parties implies acceptance of this practice, therefore this clause is no longer part of the de-facto agreement and therefore not enforceable now." So it's important that the written contract terms are upheld and defended by all parties from the outset, so the culture and behaviours are in effect more important than the written contract.
  15. gspot

    Catamaran Syndications

    I'm currently in a great boat partnership. Like anything (e.g. jobs, spouses, acquaintances) there are good ones and bad ones. And even if the legalese is sound, it's not illegal for people to be assholes, so it's important to check out the "culture" of the syndicate as well. So in addition to what others have said, do reference checks to ensure that people are generally operating in good faith, and that there is a culture of cooperation and collaboration.