DDW

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About DDW

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  1. DDW

    Epifanes clear satin question

    With varnish, there's never a last coat. Only intermediate coats.
  2. It wasn't my idea, I was running engineering, not manufacturing. We did not specify the cheese. Company got bought for $100M.
  3. I was involved in a clone type computer company that attempted to manufacture using temp labor in Texas. Often you would start the day with one crew, then half of them would be new after lunch. Anyway we had a complaint from a customer that there was something wrong with his floppy disk drive. It had a piece of individually wrapped American Cheese stuffed in it, like a floppy disk. Probably should have charged them extra for that.
  4. Best one I've heard of: a friend of mine was working for a time as a "panel beater" in Oz. That means body shop repair. Car comes in with a minor wreck. They open up the fender and find, behind the passenger kick panel, a nut hanging on a string, with a note attached that says, "You finally found me!". Show it to the owner and he says, yes, there has been a knocking sound in the car for years, many mechanics had tried to diagnose it and they never could. They think probably someone at the factory. I agree that I want the next owner to say, "Wow, they didn't cut any corners on this one!". Even if it's deeply buried work.
  5. DDW

    Dodger or no?

    A broom handle might be just a little stiff. You want the rod to bend easily and conform to the shape. I believe I used 1/8" carbon rod. Fiberglass rod or small wood dowel probably would be fine as well, but since the whole dodger top is carbon, why not?
  6. Wax out of the tube works ok on a circular blade, which has enough centrifugal force to fling off the buildup. For drilling or especially milling, you can end up with a wad of chips and wax which you are recutting and are obscuring your view. I even use it with the cutoff blade in the lathe. With aluminum, one of the main jobs of the lubricant is to keep from developing the dreaded Built Up Edge, where material sticks to the rake of the cutting tooth. WD40 seems to do that really well with aluminum - not so well with other gummy materials like titanium.
  7. DDW

    Radar Reflector

    The Navy seems to have enough trouble keeping from bashing into tankers and container ships, so I guess another electronic distraction is good....
  8. DDW

    Radar Reflector

    What is the scenario of concern? Mars Attacks? Solar flares? EMP? With any modern gps receiver, if the US GPS system is unavailable it will just flip automatically to one of the 2 (soon to be 3?) alternative constellations. Hell it won't be long before North Korea puts up it's own. These days you can buy the parts on Digikey and have Elon Musk send them up in the trunk of his car. If all else fails, a compass and dividers still work. They're even EMP resistant. Not sure I get the case for Loran except as a historical recreation like a civil war battle.
  9. It's just a mixture of Stoddard solvent and light oil according to the MSDS. I like the smell of it myself. I buy it by the gallon.
  10. For machining aluminum, WD40 is one of the best liquids you can use. I don't know why, and it isn't much good for anything else, but it works great for machining aluminum.
  11. DDW

    Dodger or no?

    The plastic bolt rope trick is a good one where applicable. Make sure a flap of cloth overlaps the outside so the UV doesn't eat it. The stuff we used is PVC and fairly rigid, but can be heat bent with care. To keep from using a million screws we used Plexus to attach it to the carbon hard top - no holes at all (you can see it through the windows in the picture. In other places, the normal attachment is to use the half twist lock things or perhaps the snap studs. I despise them. They are poorly made of weak materials, invariably corrode and break. In addition, Sunbrella shrinks and stretches with use, so these attachment are never in the right place. I did something different on mine and is has worked brilliantly, "though I say so my self and shouldn't". There is a pocket of sailcloth sewn behind the Sunbrella into which a light carbon rod is installed. The pocket also has some loops of light webbing sewn, through which bungie cord is threaded, tied off at the ends. The bungie is hooked onto SS hooks on the coaming. This pulls the carbon rod down and against the coaming. Very simple to put on and take off, accommodates the movement of the Sunbrella, is covered by a flap and invisible. The SS hooks are forever, the bungie and carbon rod easily replaceable if ever needed (it has not been).
  12. Use good quality (316) wire, and make sure the cable alignment is perfect. It will outlast you.
  13. I'd guess on the bolt holes that they were drilled separately, then when put together some misalignment noted and one side elongated to get the bolts through. The fasteners Zonker references are great if you can find a source! Since it has held for these many years, I'd just put it back together. There should be no axial loads on the radial drive. Drilling them bigger when you are that close to the edge could be trouble. If you have access to a mill you could end mill them straight and bigger, offsetting to the middle - but I'd leave it alone as I don't think it's broke. The anodizing to use in salt water is Mil Spec type III hard. It will not improve the appearance of those as all the imperfections and old corrosion will show through. And in fact little corrosion pits and imperfections/inclusions in the casting will also show and not be perfectly anodized, this is were new corrosion would start. Type II anodize is mostly ornamental, for lawn furniture and such, though it does help a little. That's what you typically see on masts and booms, because its rare to find a Type III tank big enough. Fittings from Harken and Antal are Type III hard. On old cast aluminum like that, I'd use a chromating primer and 2 part PU paint and call it good for the next 30 years. It will look better and last at least as long.
  14. There is no force on that radial drive to elongate the holes. Also no apparent deformation around them. My guess is they were that way to begin with - drilled a bit off location and then corrected.
  15. DDW

    Radar Reflector

    No (normal) radar reflector works very well, than that one pretty much not at all. I'd keep it only if you like extra windage.