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Type: Posts; User: Todd Bradshaw

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  1. Replies
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    Re: Chinese spy balloon over US

    You have proof that it was not? It is a hell of a lot easier, simpler and cheaper to make one that is open and the flight duration is sufficient for the job at hand. My comment about attacking...
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    Re: Chinese spy balloon over US

    My experience is that I have held a commercial balloon pilot's license since 1980 and worked repairing and inspecting balloons at an FAA sanctioned repair and inspection station on days when I wasn't...
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    Re: Chinese spy balloon over US

    Actually, they don't. Like your "American" balloons, the Chinese balloon was slack and only partially filled at ground level for launching. This is because the helium is going to expand a lot in...
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    Re: Chinese spy balloon over US

    Point of order... It wasn't sealed. That is what makes them pop at altitude. The bottom of a gas balloon is always open to allow the pressure to equalize as needed as the helium expands substantially...
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    Re: Chinese spy balloon over US

    There is a whole lot of uninformed B.S. in there. Balloons simply can not move sideways! They move where the wind blows them and only where the wind blows them. End of story.
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    Re: Chinese spy balloon over US

    A balloon is a balloon, and they all operate by the same principles. If it is heading toward Florida, it is only because the prevailing winds at that altitude are heading that direction. It has no...
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    Re: Chinese spy balloon over US

    CBS evening news: "It is steered by a rudder".

    Horse Hockey! If these "sources" would talk to any real balloon pilot their info would be much more accurate. Imagine trying to steer your sailboat...
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    Re: Chinese spy balloon over US

    Yep, you can hold the vent open until you fall out of the sky and you're just going to go straight down spinning. The most popular construction these days uses what is called a parachute top, where a...
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    Re: Chinese spy balloon over US

    This is impossible! The only way you can guide a balloon horizontally is to find an altitude where the wind is blowing in the direction you want to go. Anything more is simply impossible. When we...
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    Re: Sewing Test Results

    The bottom tension is already too loose on the samples provided. Unlike top tension which is made by pulling the thread between two spring-loaded disks, bottom tension adjustments are kind of crude...
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    Re: Sewing Test Results

    #16 or #18 are pretty typical for general sail use using V-69 thread. You can also use a #18 for most V-92 thread, but some of it will sew better with something in the #21 range. Some folks tape a...
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    Re: Sewing Test Results

    My take on it is that you need a bit more top tension to pull the knot closer to the surface, and more bottom tension as well. Those curved stitches on the back side and the stitches far enough above...
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    Re: Chinese spy balloon over US

    You would need something a bit larger than a pin, but a properly placed bullet hole would work. The bottom of a gas balloon is usually open. The gas stays in because it is lighter than air and that...
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    Re: Chinese spy balloon over US

    All they need is one bullet. It's not going to pop, it would work just like a vent and slowly bring it down. The chances of it actually damaging anything would be less than minimal. Unfortunately,...
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    Re: This is a Guitar Thread

    Well, that would certainly get one's attention.

    I opted for the traditional black tolex for mine, which is copied after the original Ampeg double-baffle type with a single JBL fifteen in it. Fun...
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    Re: having a craving

    We used to frequently stop at Fluky's whenever the band was in Chicago. These days we can get everything - the proper buns, dogs, peppers, etc at one of our local supermarkets and make our own. The...
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    Re: Breathable Padded Fabric?

    For that kind of stuff, I'd probably line an outer shell of Sunbrella or Odyssey (both breathable) with a good grade of acrylic or polyester sheepskin-style fleece, which is super breathable, fast...
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    Re: Stain on fiberglass cloth

    The volan sizing which is the most common one for fiberglass cloth is water soluble. You would probably wash it off with most anything, leaving an area which is far worse than what you have.
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    Re: Mast step for lug sail

    Lugsails don't need rotate. What you will find when you start sailing is that a lugsail is kind of like flying a kite. It is attached to a mast, but minimally, compared to a Bermuda sail.
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    Re: Sailrite sail kits?

    Plus one on Jim Grant's booklets. They're still available and are, by far, the most useful references that I ever found on the subject. They literally taught me how to design and cut sails. They will...
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    Re: Sunbrella vs. Weathermax80

    Pre-shrunk canvas will still shrink. If it doesn't have to fit anything specifically, that may not matter, but if it does, it can be a really big problem. Generally you figure about 3% even on...
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    Re: Sailrite sail kits?

    Most folks could do it in a weekend without a problem.
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    Re: Sunbrella vs. Weathermax80

    Sunforger is the best of the cotton canvas options, but dealing with the shrinkage makes getting a good fit which will stay that way quite difficult. I quit using it for that reason.
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    Re: Keeping a boat on the beach

    Late last fall we built a shore ramp for the Boston Whaler using a Shore Docker hardware kit and treated 2x10s. Since the bottom of that boat essentially has three keels, I also added some black keel...
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    Re: Sunbrella cleaning/DWR refresh?

    Can't help on the Sunbrella alternative treatment, but here is a really good source for waxed cotton. I bought a small roll of the Martexin 6.25 oz. a while back and it is really nice stuff. I plan...
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    Re: Sunbrella vs. Weathermax80

    What a deal :) and it's only an 8 oz. cone. Yes, it is really good stuff if you can get your tension plates adjusted to grip on something that slippery, but the price is crazy.
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    Re: Sunbrella vs. Weathermax80

    A few other things to be aware of. Your covers will both work better and last longer (including the thread) if you re-treat them every two or three years. The substance you want is a fluorocarbon and...
  28. Thread: Epoxy?

    by Todd Bradshaw
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    Re: Epoxy?

    My 1960 Starboat was glued from cedar planks maybe 3/4" by 4" with mating rabbets cut into the edges and some sort of Weldwood or resorcinol glue. The glue joints were dynamite so instead, all the...
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    Re: Sunbrella vs. Weathermax80

    Sunbrella plus is coated, so I don't usually use it and prefer a more breathable option. Yes, we had a Nordica for a while. I bought it cheap. It had been owned by an old couple who let it fill up...
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    Re: Sunbrella vs. Weathermax80

    Sunbrella tends to change its feel over time, which most of the polyester cover fabrics don't do as much. A Sunbrella cover that is a few years old will still work and look fine, but it will be much...
  31. Thread: Epoxy?

    by Todd Bradshaw
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    Re: Epoxy?

    That's a tremendously inaccurate answer, obviously written by someone who doesn't know squat about wooden boats - with or without epoxy.
  32. Re: Best finish for new Ash gunnels on a "dark side" Canoe?

    Ash is quite common on canoes because it is tough and bends well, especially if nicely straight-grained. The thing which will make it last, or not, is maintenance. Keep it freshly oiled or varnished...
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    Re: The Beatles - Get Back

    They're not bad, though these days they probably come with round-wound strings, which don't yield the same sort of woody thump that the originals had back in the day. There are a couple different...
  34. Re: Clear coating on mahogany gunnels - UV damage?

    I mean while still wet - as a temporary indication of what they might look like if a new coat of varnish was applied.
  35. Re: Clear coating on mahogany gunnels - UV damage?

    What do these areas look like if you temporarily wet them down?
  36. Re: Q: Making mini-deck for mast partner in thin fiberglass hull

    Perhaps a wider-angle photo would help us figure out what exactly you are planning. Tox, amas are the floats and akas are the crossbeams for a trimaran.

    Red flags so far: Drilling holes in a...
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    Re: 1/8" Thick WRC Stripper Kayak?

    I built this one back in the mid 1970s from 3/16" sitka spruce strips (square edged, no bead and cove) and it worked OK. To do one with 1/8" strips is possible, but you would need to be awfully...
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    Re: The Beatles - Get Back

    I had one of those Harrison solid rosewood Telecasters for a while. It was the nicest woodworking I've ever seen on any Fender. Heavy bugger though.

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    Re: Bora care before penetrating epoxy?

    Only if you're bound and determined to screw up the project. Proper techniques for cold molding are well established and tested over decades. Learn them and stick with them.
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    Re: Whoops! Anybody Missing a Prop?

    My BIL and sister lost a prop once. Unfortunately, in this case it belonged to an Aeronca Champ. Luckily, they were out in the country and my BIL is also a glider pilot and set it down in a farm...
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    Re: Bora care before penetrating epoxy?

    In my opinion it certainly is. The best thing to seal wood with is 100% solids epoxy resin. Anything else is more likely to cause problems than "cure" or improve anything. There have been thousands...
  42. Re: AUTOMOBILE (designs) from the years 1950-60 that were never seen on our roads

    My uncle was on the Turbine car support team and at one point he sent me a model of one which looked just like that one. The company would loan them out to people all over the country to try. If...
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    Re: Fairing a cedar strip hull. When?

    Yes. Filler powder mixtures are a lot less "sticky" than plain resin and they don't soak into the wood's surface, so for an ideal bond you want to start with a thin coat of plain resin as a tie coat....
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    Re: Fairing a cedar strip hull. When?

    Pigmented epoxy is a real pain to work with. You are better off starting with a "saturation coat" (Gougeon's term for a first coat of plain resin/hardener on bare wood) then fairing compound as...
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    Re: Fairing a cedar strip hull. When?

    Remember though that he's talking about 1/4" thick strips. You don't have an awful lot of wood there for multiple sanding passes. The notched spreader can work, but it is best with square notches,...
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    Re: Fairing a cedar strip hull. When?

    Glassing over any voids is asking for trouble. Any cracks between strips or unfair transitions should be filled and sanded fair before glassing. The danger in glassing over cracks or level changes is...
  47. Re: I know nothing: Rowing-friendly reefable rigs?

    A lugsail in that size range would yield a noticeably shorter yard and an optional boom. Something similar to this.

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    p.s. Never use the words "Sail" and "darts" in the same context. Real...
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    Re: Sailmaker's palm

    I once found our dog with his nose buried in the bag that I keep hand sewing stuff in, looking seriously at two very expensive, top of the line Smith's palms like they were rawhide chew toys. I'm...
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    Re: Sailmaker's palm

    There really isn't much reason to have a buckle. Once set, you leave it at that state and since it is molded specifically for your hand, you don't want other people wearing it. The straps on mine are...
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    Re: Sailmaker's palm

    You can mold it to a custom fit, but the last thing you want to do to a palm is to soften it with oil or similar leather dressings. To mold it to your hand you soak in water until the leather...
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