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thinwater

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About thinwater

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    Anarchist

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  • Website URL
    http://sail-delmarva.blogspot.com/2017/01/the-book-store.html

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  • Location
    Deale, MD
  • Interests
    Sailing, climbing, kayaking

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  1. Yes, you always need to have a place to put the extension when not in use. A clip on the top of the tiller is traditional. The rubber is neat on dingies. But don't expect it to last for years in the sun. On a keel boat, I think I would find the non-removable style annoying, since I don't always use the extension.
  2. Oddly, very little actual advise. And you'd guess none of these folks shit or have changed a diaper. --- I'd suggest using a Duststopper (Home Depot) on top of a bunch of 5 gallon buckets. This way you get 3-4 gallons into each bucket, which is enough to carry (5 gallons is really too heavy to carry or pour). You should not get much in the shop vac (which can be cleaned with bleach when you are finished). Yes, the bockets will collapse if you bock the vacuum, so make sure you are always getting some air. If you want to kill the smell, I suggest bubbling air from a compressor in
  3. So explain the Mantus Dinghy Anchor performance (>100 x multiplier). I'm just an engineer, have tested many anchors, and have read much of the literature, so use small words. I do understand the graph, but the data seem to say something different, and I find that interesting. Not all things are equal, so perhaps it's not all about the angle. I would not use the phrase "all talk and no trousers" at this time. At present, I see confusing data, not definitive data.
  4. Any kind. Then shoot myself in the head on day two so that 7 generations will not suffer if I screw up. Thankfully, I don't believe in gods. --- Playing the game, they better throw in a house near the water someplace I want to live and can have a wife and career I like. Following that thread, if not... It better be a boat that I can take with me, because I might need to move inland (the deal did not include providing a lifestyle). A smaller trimaran (24-28 feet) would have suited the younger me and it does suit the older me. In the middle... I could deal with the shortcomin
  5. I also tried the M1 with no roll bar, to see if that was limiting diving. There was no statistically significant difference in holding capacity in firm sand. Note: I did not use a truck on the beach. I anchored a cruising cat in close to the beach with big anchors, and tested the anchors in about 4-5 feet, pulling with the primaries (I rigged 2:1 purchase for larger anchors).
  6. I tried that in open water with my f-24. The load was ~ 10% greater by the stern in light winds, and 15-20% more by 15 knots. I stopped then because I have an open transom! In both cases there was very little yawing (wide bridle). So, unsurprisingly, there is slightly more windage and wave resistance. Not much. Yes, anchoring by the transom reduces yawing. I tried both with no bridle. But the livability issues and motion of the boat (I've tried this cruising with my PDQ catamaran as well) are so much worse I always abandon it in favor of conventional bow anchoring within an hour of two.
  7. I have tested that anchor with and without chain, including zero chain. No, the chain has almost nothing to do with hold at reasonable scope (rode near bottom). I suspect the reason it does not scale up as you would expect is that the Mantus M1 sets very quickly and reliably, but does not typically go deep in firm bottoms. It's an angle thing. Curiously, this is not the case in soft mud.
  8. Yup, I did a bunch of testing on this a few years ago. Most of this is boat, ground tackle, and situation dependent, but yawing can reduce the holding security (reduced holding capacity plus increased load) by more than 75%, depending on the severity. This makes arguing over 35-pounds vs 45 pounds (28%) almost secondary to steady anchoring.
  9. How long is a string? I have a P9000 and 2 x 10-pound tanks in a locker. I use it a good bit and would not go with less. Also, in the PNW, I would think you would use it a lot. Maybe even cool weather day sails, for a nice warm cabin to warm up in. Carry more fuel and you will get more use out of the boat. I would not go less than a single 10-pound bottle. No way. Wall-off a section of the locker and add a drain. Easy. There is a fitting to pass the hose through.
  10. I find that squinting is the best boat cosmetics tool.
  11. When anchors are over powered, they tend to fail either by hard-lockup followed by popping out, or by stable dragging. The Fortress is an example of the first. The Delta in soft mud is an example of the latter. Others fall in the middle; the Mantus M1 will drag, but an anchor with a steeper angle (Rocna, Manson, others) may hold more, but then pop-out and struggle to reset if the boat is dragging fast. Which is better, and why. Yes, I know this is an open ended question with more than one answer. It's more fun that way.
  12. Yup, I've modified a few anchors for testing. I understand. I'll probably have a go at one of my Claws (I have two, 2-pound Claws).
  13. I have (and others) done scaling tests on consistent bottoms (not rock, weed, trash) and found the numbers consistent over an astoundingly wide range. But that consistent bottom caveat is very important. Also, I personally have not studied the Bruce/Claw design in this way. I wonder if the blunt curves of the Bruce change the way is cuts into the bottom and scalability. Certainly, it does not like to roll over into setting position if there are weeds or trash... unless it is heavy enough to mash through them. Which could explain the difference in behavior with larger sizes. It is so
  14. Good observations. So, are you going to sharpen one of the Claws to see if that makes a profound difference? Yes, that would obviously increase corrosion. But I have a 2-pound Claw I would like to use as a dinghy anchor, and that might make the difference; unlike the Mantus Dinghy Anchor, a 2-pound Claw is not enough for an inflatable. Corrosion is not really that big a deal in this application. I also use the 2-pound claw as a kayak fishing anchor, but in that case it is already enough. There is something to be said for not TOO sharp. For the first year, until it got some wear on it, th
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