K800

Discussion in 'Sailboats' started by Schoonner, Dec 19, 2011.

  1. Schoonner
    Joined: Nov 2011
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    Schoonner Senior Member

    WOW! I want this one:


    Too bad I only have $25.00 in my savings account.:eek:
     

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  2. Perm Stress
    Joined: Sep 2009
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    Perm Stress Senior Member

    1800g for a mast for model this size is WAY too much.
    even if this is a typing error, and mast weight is 180g, it is still too much.
    the ballast keel weight is not necessarily so heavy for model this long .
    wooden stick of about the right diameter according to plans will many times lighter and strong enough, if properly stayed.
     
  3. Schoonner
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    Schoonner Senior Member

    I am attempting to make my own blocks.

    this plastic is too soft though. I need something like nylon... Hum... maybe I should go look at storage for some nylon gears or something? naw, it's cold outside and I haven't eaten since 3 AM

    [​IMG]

    Uploaded with ImageShack.us

    Oh look I made one anyway, It won't work because it needs better plastic but you get the idea...






    [​IMG]

    Uploaded with ImageShack.us
     
  4. Schoonner
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    Schoonner Senior Member

    ANybody want to try some hand cut carbon fiber pulleys!?!? I just got one side to fin into the hole I wanted it to. It is all one piece, with the pulley and axle being cut from a single piece of extruded carbon. =0) It's tiny, maybe 4 mm diameter. I can make it so that it works with several lines per block, but I can only make 4mm diameter ones right now.

    They are self lubricating!!!

    EDIT!!! If someone can print out or laser cut some frames I'd be willing to trade for any size pulley blocks for almost any size line. =0) I need tools too =0)
     
  5. Schoonner
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    Schoonner Senior Member

    This is my first pulley/axel combo

    [​IMG]

    Uploaded with ImageShack.us
     
  6. Schoonner
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    Schoonner Senior Member

    I bet nobody else has 4mm carbon fiber block and tackle on their RC boom!! LOL! Neener neener ha HA!!!

    More than half way done!!

    [​IMG]

    Uploaded with ImageShack.us
     
  7. Schoonner
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    Schoonner Senior Member

    test fitted. It works, but needs rope run through it again and again to work all the rough edges away

    This is just with electrical tape holding it together. I will glue it later when I decide that this is actually what I want to do with my carbon fiber.

    [​IMG]

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  8. Schoonner
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    Schoonner Senior Member

    Does anyone know what makes ball bearings smoother? Is it because there is more friction, but it is more spread out or something?
     
  9. Schoonner
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    Schoonner Senior Member

    I remembered how the end of the umbrella got full of rocks and dirt. I used it in an emergency to keep the side of the highway from getting eroded away. It was raining so hard that water coming down the hill was bringing rocks with it and a stream had been cut in the time it took to walk a few hundred feet. So, I used the end of the umbrella to unblock the storm drains on the way up the hill because it cut a path up to my knees in only a few minutes and was pouring onto the highway below the bridge changing the angle from about 60 degrees to about 45 at the bottom. :eek:

    I have to borrow a scale from my neighbor so I don't know it's 'real' weight.

    EDIT:: I think the rain paused a day or so later... that slanting bridge would have been undercut badly. People came out and worked on the bridge after that. They wouldn't tell me what they did though. =0(

    EDIT EDIT:: I want the mast to be stronger than usual because I want it to be a free-standing mast. I think I know more what I want to do though. I want to make the mast like a bicycle hub Cannondale made for their lefty forks.

    http://en.wikipedia.org/wiki/File:Cannondale_Lefty_Fork.jpg[​IMG]


    EDIT EDIT EDIT:: Scratch that'll weigh too much to make it swivel like a wing mast...
     
  10. Schoonner
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    Schoonner Senior Member

    Nevermind!! this is not carbon fiber!!! It flakes like fiberglass. I can tell because it is sticking into my fingers with tiny little splinters too small to see.
     
  11. Doug Lord
    Joined: May 2009
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    Doug Lord Flight Ready

    ------
    Carbon will do that more that fiberglass! Carbon dust is worse than glass to breathe and it will itch more than glass when you grind it. It is very conductive so watch for accumulations of dust near tools, plugs etc. Always, where a mask and googles when sanding or grinding it!
     
  12. Schoonner
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    Location: Washington State USA

    Schoonner Senior Member

    Oh, okay, thanks. =0) I can't find my graphite dry lubricant. I have some somewhere that is not supposed to be able to be washed away because of some kind of waxy attractant that smears over the parts. I think it would help this little pulley a lot. That and I need to redo it because the axles are not long enough:rolleyes: I'm afraid to thin down the ridges of the pulley wheel any more than I already have and building another one won't take too long.

    EDIT:: Here's a better picture:
    [​IMG]

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  13. Schoonner
    Joined: Nov 2011
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    Schoonner Senior Member

    I'm taking two extruded rods and making a gaff out of them by spreading them apart and adding a thin piece of carbon between them with space for the mast to fit through. Then I plan on starting the sails while I wait for next month to arrive so I can purchase a very nice tapered mast.

    My fingers are tired of turning this tiny drill bit. I should look for a replacement drill motor soon. My roommate took off with that, my dremel rotary tool, lots of stuff that would make this lots faster...

    I believe that simplicity is better than anything and that's why I'm making a split style boom I am thinking about buying 1mm thick round rod like you see in the picture that will be 300mm long so that it will go from between where the boom rods spread near the mast and then gets pinched out from between them until it goes between the rods and makes them spread for the pulley wheel. That way I have all these crowned rods that arch against the forces put on them making it stiff as possible.

    EDIT:: Gaff is NOT the right word sorry.
     
  14. Schoonner
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    Location: Washington State USA

    Schoonner Senior Member


  15. Schoonner
    Joined: Nov 2011
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    Schoonner Senior Member

    Humm, I could put a couple more pulleys in there, couldn't I?
     
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