Wet Spreaders

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115 F'n Saint

About Wet Spreaders

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    Super Anarchist

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  • Location
    SF Bay
  • Interests
    Sailing

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  1. Wet Spreaders

    new halyards

    Does not surprise me at all. On the other hand, I'm using 3/8" Crystalyne (low creep and bulk needed for clutches). That has a rated breaking strain at 11,000 lbs. If I'm putting 11,000 lbs on the luff of my mainsail (34ft boat), something has gone horribly wrong - like my boat is being picked up by the masthead on a planet with 2G gravity. I think it's fine to flip the halyard over provided there is no chafe or obvious sun rot on the section from the clutch to the sail.
  2. Wet Spreaders

    Casting threads in composites

    You can also make a tap. I do this from time to time when I need a metric thread (I don't have metric taps and I'm too cheap to buy a set). Take a hacksaw and cut a groove in the end of the bolt that you want to make a thread for. Both sides of the bolt if you like, a little deeper than the thread depth. I don't bother tapering the tap because I only use this for soft materials (aluminum, plastic, composite etc). In your case, I bet you could easily saw a cut in 4 or 5 theads without losing any strength. You need a sharp edge on the cut, so a saw might be better than a grinder if you try this. Because it does not have a taper, you need to be very careful how you start the tap - or else resign yourself to losing the first couple of turns to wobbling and mashing of the threads. It's a bit ghetto, but it works.
  3. Wet Spreaders

    new halyards

    When I'm feeling thrifty I buy cover. I can get another couple of years out of a core by flipping it end for end and recovering. Especially if the old core was treated with one of the polymers first, it's essentially like-new under the covered tail. 80% discount - 70% for the cover and 10% because you only need to buy enough cover to get to the mast base. Because it's cheap already, it doesn't really matter who you buy it from. Same with spinnaker sheets. The cover wears out at the winches, but the core is fine. Although I tend to buy the expensive cover because cheep cover melts on a windy day, so this only saves money in the long term because the replacement cover is better than the stock cover and lasts multiple seasons.
  4. Wet Spreaders

    Taming a nervous NKE auto pilot

    ...and any menu item you really need to get to is down an unlit stairwell into a cellar, at the bottom of a locked filing cabinet stuck in a disused lavatory with a sign on the door saying "Méfiez-vous du léopard".
  5. Wet Spreaders

    Casting threads in composites

    You have to pick your moment, but this works for me.
  6. Wet Spreaders

    Taming a nervous NKE auto pilot

    Yeah - distant memory resonates on the "Rudder Coefficiant". Anything labeled as a "coefficient" likely means that the nerds who programmed the interface were considering a variable that gets multiplied with the input signal as part of the control loop. Turn it down to reduce the effect. The guys above discussing whether your linkages had slop in them were intuitively checking the phase margin in your loop - roughly speaking, that's the delay from action to outcome. If your observation to outcome is too slow, you end up oscillating as your control inputs amplify the effect rather than dampen. Same as pilot induced oscillation in an aircraft, or snake-wake when sailing downwind.
  7. Wet Spreaders

    Taming a nervous NKE auto pilot

    I had this on my NKE setup years ago. It's a bit of a dim memory now, but I think that the fix was related to a compensation for speed through the water. Control systems theory helps understand what's going on - basically it's an oscillation because the gain is too high and the phase margin is too low. That sucks because you can't set a Gain less than 1 and the phase margin is a physical property of the boat. As I recall, you can mess about with Gain settings and all that stuff, but the AP continues to saw away sucking power and generally being annoying. So, you have to dig into the menus and find a parameter that further reduces Gain. There's a parameter buried in the menus somewhere that corrects gain for boat speed. This acts like a variable control loop gain that reduces the gain with boat speed. Turn it down and you should see it stabilize the loop and prevent the oscillation.
  8. Wet Spreaders

    Casting threads in composites

    This. Don't let it fully cure before backing out the thread.
  9. Wet Spreaders

    Kids, PCs and wierdness

    Yeah - good luck with that. We bought a nice home in wooded suburban luxury, with a crawdad stream, hiking trails, animals and freedom to roam. If I was a kid here, I'd be fishing buckets full of critters, hiking to places where my parents can't find me, damning the stream with lumber stolen from the neighbors falling down shed and flooding the neighborhood, sword fighting with cut off branches until someone's eye gets put out etc. They sit inside all day killing virtual zombies, eating chips and swearing at their friends through the internet.
  10. Wet Spreaders

    Kids, PCs and wierdness

    So my kid decided to speed up his video game frame rate by cleaning the inside of the PC. Leaving aside the major fail in the assumption that cleanliness helps videogame frame rate, he managed to remove the processor and fuck up the LGA socket. Despite bending the microscopic pins back using magnifying kit from my work lab, the PC stubbornly refuses to boot. Probably processor or motherboard or both are fucked. Computer economics being what they are, replacing either one of those things at random on a 6 year old desktop is not cost effective, so I bought a new machine. But I want my files off the old disk. I have backups, but not for everything and it would be nice to dig through it before consigning it to the Draw Of Forgotten Computer Stuff. It will enjoy hanging out with boxes of 5.25" floppies etc. When I mount it in the new machine and plug it in, the stupid new machine boots from the old disk and refuses to boot from it's own fancy SSD drive. I have tried adjusting the boot order in the BIOS, but in spite of saying on the screen that the boot order has changed, it still refuses to do as instructed and continues to boot from the old drive. From a file management POV I can probably deal with this by copying my files from the old to the new disk anyway, but I would really like to keep the old disk mounted in the new PC - why not keep a spare TB around, that can soak up a lot of sailing POV videos and a considerable quanity of HD porn - which is the alternative suspected reason for my kid being fascinated with frame rate improvements. Does anyone know if there's some magic incantation needed to make the BIOS actually change the boot order, or whether there is anything special about the SATA interface order that locks the boot order to the port number?
  11. Wet Spreaders

    My balls fell out

    I had a go at coping the part into Fusion 360 and printed a replacement. Broken part that let the balls out on the left, my part on the right. I'm trying to decide whether to trust it or not. The only way to print it was to lay it flat, which makes the layer adhesion at the point where the old one broke a critical parameter I'm trying to decide whether to trust it or not.
  12. Wet Spreaders

    Modern Weed

    My kids are well into their teen years. When I tried to have the "please don't smoke pot" conversation, they roared with laughter. Apparently, pot is for old people and not cool at all.
  13. Wet Spreaders

    My balls fell out

    We lashed ours down to the traveler - we didn't like the look of the direct main load on the small turning blocks bolted to the cockpit sides. I had visions of them pulling through the laminate on a bad gybe. Same type boat, same traveler, same race - who would have guessed that Jeff's event would eat traveler cars. I just bought a new car. Since the blocks screwed to the car are bent and one of the pulleys is cracked, and the replacement block seems to be EOL, $300 for a new 4:1 car looked like a better option. Hopefully the P.O. didn't bed the traveler in with 5200 or something stupid like that. Also, since it's an hour drive and I can't get to my boat until the W/E, I'm guessing that it's a mid-range 27mm track. Can someone confirm?
  14. Wet Spreaders

    My balls fell out

    Not spontaeous - the plastic end cap tha traps the balls broke. At a minimum I need new end caps and I'm pretty sure I lost some of the balls, so my plan is to buy new end caps and new balls and reassemble. Harken's website is very slow right now and I can't get their technical data to check whether what I have is a mid range or a big boat version. I'm hoping someone knows by sight, then I can order the end caps from Harken and the balls from McMaster. I can 3D print a small piece of track to use to assemble everything, but I can't get at the ends of the track because the fiberglass is in the way. I'm hoping someone has a technique for mounting it on the track ball-less, and fitting the balls later. I'm guessing that it's not easy.
  15. I'd buy the HMR99 Midrange traveler rebuild kit.  It has new endcaps, screws, 60 torlon bearings, blue loctite, a loader and instructions.  You don't have to use the loader.  You can put one end cap on, squirt the car full of shaving cream to hold the balls in place and stuff the balls in.  Once full put the other end cap on and hose the sucker out.  

    The part number for the double stacked sheaves on the car is 1515.  They're sold in pairs.  Buy them now as they have been discontinued. Actually they were discontinued 10 years ago and they're making one, final run of 100 of them before they're gone forever.

    https://www.harken.com/uploadedFiles/Support/Service/Travelers_QuickService_online.pdf