DSE

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Everything posted by DSE

  1. Machine learning: https://en.wikipedia.org/wiki/Machine_learning
  2. DSE

    How to build large format display

    I wonder if it would work as an cheap on-deck chartplotter as well. With it running android, I'm guessing it could run openCPN. Great to finally see some progress with marine displays with what appears to be more option becoming available.
  3. DSE

    How to build large format display

    Anyone know anything about this one? https://www.vakaros.com/ Looks like e-ink or something. I wonder if it will display NMEA data.
  4. DSE

    Recoating carbon mast

    If its already flaking, razor blades are going to be quicker in getting the bulk of it off. It's lot of sanding otherwise and it seems like you end up removing more of the carbon.
  5. DSE

    Recoating carbon mast

    Use razor blades to scrape old clear coat and sand (lightly). Wear a respirator, long sleeves and gloves. It'll be itchy. That will be most of the work. Solid color Awlgrip is the way to go. You can roll and tip to get a good finish, but spray is probably best. If you can, coat it indoors if in a controlled temperature environment to avoid variability in the finish due temperature changes, issues with bugs and dust, and issues with condensation causing it to haze if you leave it to dry overnight.
  6. DSE

    Using an iPad for a Mast Instrument Display

    Sunlight readability is the biggest problem with an iPad. Pretty good discussion here:
  7. DSE

    How to build large format display

    This looks pretty cool and am kind of tempted to order one. Like the OP, my main interest is the displaying large digits for boat speed, depth, apparent wind, TWS, etc. and not so much the start line and tacking angle stuff. You are saying this will display "4 items of telemetry in real time". So you could display something like boat speed, apparent wind direction, wind speed and depth on one page/screen? I'm currently using tacktick. It sounds like I would just need to run a wire to carry the 0183 data from the tacktick NMEA interface to this display.
  8. DSE

    Bad Company

    That's one of the yellow SC27s. Yes, a well sailed and dedicated crew. I remember that race and the speech from the crew afterwards.
  9. DSE

    Bad Company

    There's SC33 that does pretty well in most PNW races. Weird hearing that it doesn't sail to its rating.
  10. I'm looking into purchasing a Santana 30/30 GP. The majority of what I've read indicates the boat to be a great light wind PHRF racer. I've also read that there weren't very many of these made (40 GP's and 40 PCs I think). I've been able to find info on the WD Shock website and sites like SailingJoy regarding the rig and displacement. I have not been able to find much on polars, known issues, upgrades, etc., similar to whats on the Soverel 33 site. The Santana 30/30 site appears to be defunct. Does anyone have sources for this info? As far performance, would I be close using data from something like a j-30? My hope is that it would be competitive against a B-25, J-35, Express 37, J-105 in mostly light wind. I currently race a Catalina 30, PHRF 189 (Ewgaad right?) and struggle to compete with a Cal 9.2 (186), thunderbird 26 (195), catalina 27 (222) in anything less 8 knots. Thanks
  11. The checkstays on on my 3030 used a car on track that was between the genoa car and cabin top. A dyneema line (3/16 I think) was tied from the car up to the mast. There was another line connected to the car, led aft, and then cleated in a cam cleat for adjusting tension. For the hatch, I had called up W.D. Shock and they were able to make a fiberglass one from the original mold. I think mine was the same as shock 35. This was about 5 or 6 years ago, not sure if they will still do this.
  12. Some polars and trimming guide I used for my 3030.Perfomance_cheatsheet2.xls
  13. DSE

    Sidestay tension, why does it matter?

    If you have 100kN of preload, you would need a 100kN load to over come that preload. A bolted joint is another example of this: http://www.machinedesign.com/fasteners/demystifying-bolt-preload The preload is basically a stretched spring. To stretch that spring even more you need to apply a force that is greater than the force required to stretch the spring when it was slack.
  14. I've read a couple threads where people have used a choker or inhauler on a masthead rigged halyard for flying a fractional kite. I guess I'm wondering what is used just above the forestay fitting for the choker/inhauler to work on a carbon fiber mast. The boat is an FT10 and I know a bunch of boats have been modded to fly a fraction kite. I was thinking something like this might work: http://www.melges.com/?p=store/details&sku=12263&cat=43&SID=gnhak0m4r8cplb15puet9itfl6 I was also thinking about CNC machining something out G10 and glassing on to the mast, but would prefer a simpler solution.
  15. DSE

    Flying Tiger

    In the heavy upwind chop it seems like you'd still risk the mast hitting the forward area of the partners. Maybe putting more tension on the lower diagonals would keep this from happening? I've seen where a line is tied to the mast, back through an unused halyard clutch and then tightened to keep the mast from pumping forward. I suspect this may be the system MHK had used as it also gives you the ability to slightly adjust the mast rake and lower fore/aft mast bend.
  16. DSE

    Flying Tiger

    Sandbar, not a rock.
  17. DSE

    Flying Tiger

    Thanks for the info. I think the drawing would be helpful. I have been able to locate where the sleeve ends above the forestay. I'm assuming the block used is the same as the harken spinnaker halyard block.
  18. DSE

    Flying Tiger

    Cazza, Thanks for the ideas. You are guys are looking good there. Lashing a friction ring to that hole in the forestay fitting crossed my mind as an option as well. I did find out that North Sails has a fractional 'kit', but they weren't clear on how they rig it.
  19. DSE

    CF mast refinish

    Loss? A lot more "slaving" to remove the flaking failed clear only to have to repaint again.
  20. DSE

    CF mast refinish

    I'd just roll and tip with awlgrip primer and topcoat with a solid color, not clear. Clear won't do as good of job for UV protection and will fail/flake off after a few years.
  21. DSE

    Flying Tiger

    That's what I have except I'm unsure on how to best rig the choker/inhauler part.
  22. DSE

    Flying Tiger

    I know a lot FT10s have a fractional spinnaker halyard setup using a choker/inhauler. I've got a masthead crane and pulley figured out, but was wondering about how the choker/inhauler is rigged. Are people cutting a knockout for a sheave above the forestay fitting?
  23. DSE

    Yanmar 1GM

    The exhaust elbow on these don't last that long and the head will have a bunch carbon deposits restricting flow as well. There used to be someone on ebay selling them for $100. To clean the carbon deposits out of the head, it's probably best to pull the head (not hard to do). When cleaning, be careful not to chisel into the water jacket. If you damage the head a new one will be about $400. With head off, you can inspect the cylinder walls and valves which are probably fine. Not related to your issue, but keep an eye on the water pump leaking salt water onto the aluminum oil case cover and corroding it. If it's leaking, pull the pump and replace the seals and possibly the shaft.
  24. DSE

    Fractional Spinnaker Halyard

    Sarcoma, did you end up finding a setup that worked? I was planning the same thing on an FT10. I don't a have sheave or anything above the forestay and I'm a little reluctant to cut or drill in this area of the carbon carbon mast.
  25. DSE

    Boots

    They're lightweight, flexible and plenty of grip on a fiberglass deck. In the year or so I've used them, they've held up well and don't leak. I try to be careful to not wear them much off the boat but have occasionally. The tread is fairly soft and is starting to show a little wear. They aren't difficult to pull off after unstrapping the velcro as they're fairly stretchy. I tried on the Dubarrys when I tried these on and these felt less clumsy, almost like wearing an athletic deck shoe. I don't think they'll last as long as Dubarrys, but it I didn't pay the Dubarry price either.