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Technology: New supercapacitors and batteries.

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      CommentAuthorAngus
    • CommentTimeOct 5th 2011
     
    Somebody particularly hates the little wheel on the bottom of my boat that is supposed to spin and tell me how fast I am going, except that there's usually a mussel living in it.
    • CommentAuthorloreman
    • CommentTimeOct 5th 2011
     
    To get rid of it, you need to love mussel!
    •  
      CommentAuthormaryyugo
    • CommentTimeOct 5th 2011
     
    Posted By: TrimOne for Mary from Physorg

    A coating that prevents barnacles forming colonies
    Interesting-- I wonder how good it is in practice if it allows "initial colonization". I'm sure "Practical Sailor" magazine will test it and then we'll know.

    @Ang:

    We take our little paddlewheel out after each trip and replace it before the next. When it's out, before we put in the inert plug, it's a big hole in the boat but the sensor tube has a one way valve that sort of works and limits the damage and we have a cylindrical sleeve around the sensor that extends above the water line in case of leaks. It's a pain to put in or take out but it's nice not to have the sensor wheel full of critters.
    •  
      CommentAuthorAngus
    • CommentTimeOct 5th 2011 edited
     
    Posted By: maryyugoWe take our little paddlewheel out after each trip and replace it before the next. When it's out, before we put in the inert plug, it's a big hole in the boat but the sensor tube has a one way valve that sort of works and limits the damage and we have a cylindrical sleeve around the sensor that extends above the water line in case of leaks. It's a pain to put in or take out but it's nice not to have the sensor wheel full of critters.


    Not a possibility on the Oceanis. Can't say I'm sorry, really. Sounds like a minor nightmare.

    The little buggers don't usually find their way in until winter, and I have to get under it in the spring anyway. (Since I'm not a racer, summer's my season.)
    • CommentAuthorenginerd
    • CommentTimeOct 5th 2011
     
    A moletrap specialty. The thread title is "New supercapacitors and batteries", and we are involved in a discussion about loving mussels, or else the love muscle.
  6.  
    From the price of VIagra, to the prevention of barnacles on your love muscle.... in two pages. A record of some kind, surely.


    And are you sailors telling me that you no longer throw a log overboard, on a string with knots in it?

    And you've not yet downloaded your iPhone iLog gps waterspeed app?
    •  
      CommentAuthorAngus
    • CommentTimeOct 5th 2011 edited
     
    Posted By: alsetalokinAnd you've not yet downloaded your iPhone iLog gps waterspeed app?


    Ah, Al - you underestimate the instrumentation on a modern sailing vessel. We need GPS for course made good, and we also need water velocity plus relative wind vector (from a vane and anemometer) so that we can compute absolute wind direction and speed when we need it. Wind gauges do that automatically. We also need to estimate current from the GPS speed and water velocity.

    iPhones have a horrible tendency to go overboard.
  8.  
    So.... licking your finger and holding it up into the breeze isn't good enough anymore?


    And iPhones _don't float_??? That definitely sounds like a design flaw to me.
    Or maybe it's an opportunity... the iFloat, a lifejacket for your phone...... hmmm......
    •  
      CommentAuthorTrim
    • CommentTimeOct 5th 2011
     
    Physorg

    "Without the additive you put 100 electrons into the battery and you get 85 out. With the additive, you get 99 out," Cui said.

    Sulfur in hollow nanofibers overcomes challenges of lithium-ion battery design
    •  
      CommentAuthorAngus
    • CommentTimeOct 5th 2011
     
    Posted By: TrimPhysorg

    "Without the additive you put 100 electrons into the battery and you get 85 out. With the additive, you get 99 out," Cui said.

    Sulfur in hollow nanofibers overcomes challenges of lithium-ion battery design



    It's okay
    The losses that reduce coulombic efficiency are primarily due to the loss in charge due to secondary reaction, such as the electrolysis of water or other redox reactions in the battery.


    But it sure sounds odd when said that way.
  11.  
    Posted By: AngusThe losses that reduce coulombic efficiency are primarily due to the loss in charge due to secondary reaction, such as the electrolysis of water or other redox reactions in the battery.

    Well, that's very similar to the story I told her. But she just said, "That's OK, it happens to all the guys at one point or another." It's probably true, but who wants to go there.
    •  
      CommentAuthormaryyugo
    • CommentTimeOct 5th 2011 edited
     
    Posted By: alsetalokinAnd are you sailors telling me that you no longer throw a log overboard, on a string with knots in it?


    http://www1.raymarine.eu/view/?id=1237

    Tackticks stuff works for the most part and it's mostly wireless which is nice. But I've found that the wind system is pretty flaky. Mine is anyway and it's way aloft so messing with it isn't terribly convenient.
    • CommentAuthorenginerd
    • CommentTimeOct 5th 2011
     
    Yeah, and why does this forum seem to sport so many sailors and pilots. Or does it just seem that way because people are so unbridled when it comes to their hobbies? But we don't have any golf rants.
    •  
      CommentAuthorAngus
    • CommentTimeOct 5th 2011
     
    What can you say about golf. I live across the street from the 16th tee of the local course. I can't generally hear anything, but one sequence I do hear fairly frequently goes:

    "Whack!"
    "Shit!!"
    "FORE!!!"
    • CommentAuthorloreman
    • CommentTimeOct 5th 2011
     
    I am an archer. In archery there is no "fore!".
    •  
      CommentAuthorAngus
    • CommentTimeOct 5th 2011
     
    Much the same in horseshoes.
    • CommentAuthorenginerd
    • CommentTimeOct 6th 2011
     
    In archery there is no time for a post-release fore, but that should be possible in horseshoes. Perhaps you are supposed to scream something else when you have a wildly errant horseshoe.
    •  
      CommentAuthorAngus
    • CommentTimeOct 6th 2011
     
    Posted By: enginerdbut that should be possible in horseshoes


    Oh. I thought you were talking about custom, not possibility.
  19.  
    Posted By: enginerdIn archery there is no time for a post-release fore, but that should be possible in horseshoes. Perhaps you are supposed to scream something else when you have a wildly errant horseshoe.

    Try shooting at 90 meters.
    Even with a fast compound bow there is lots of time to shout.
    fore "skin" The last added because there was time
    • CommentAuthorenginerd
    • CommentTimeOct 6th 2011
     
    I guess I was partly questioning why the custom had not manifested due to the possibility, and presumeably the advantage.

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