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Crane Lines

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  • Member since
    August 2004
  • From: Amish country Tenn.
  • 10,027 posts
Posted by loathar on Friday, March 27, 2009 9:57 AM

COPPER! Thumbs Up Didn't even think about that!Dunce I have plenty of types laying around to try. Thanks!

  • Member since
    December 2001
  • From: AU
  • 713 posts
Posted by xdford on Friday, March 27, 2009 4:58 AM

Try using thin copper wire which you get a reasonable length of and put one end in a vice and putting the other end in a power drill and spin it until the wire is nearly at break point. This will work harden it. 

You will find that the wire can be kept straight and looked at closely could represent the twisted lines of cable strands and bent around small wheels ( for the pulleys) should help you and yet keep fairly straight... sorry you won't be able to operate it but I presume that is not an issue for you!

Hope this helps

Trevor www.xdford.digitalzones.com

 

  • Member since
    August 2004
  • From: Amish country Tenn.
  • 10,027 posts
Posted by loathar on Thursday, March 26, 2009 12:06 PM

I tried some .008 guitar string but it was to springy and wouldn't hang straight. Kind of bowed out too much. I  think brass would work OK, but I don't have a local source for it. Gonna try string and maybe starch or hair spray next.

  • Member since
    November 2006
  • From: Northeast
  • 746 posts
Posted by GraniteRailroader on Wednesday, March 25, 2009 9:43 PM

 Try hair-spray.

Weight your hook down on the finished model, cover around the back side of the string to prevent overspray from getting on the other portions, and spray it. It'll give it a brittle but stiff finish.

This space reserved for SpaceMouse's future presidential candidacy advertisements

  • Member since
    February 2008
  • 8,877 posts
Posted by maxman on Wednesday, March 25, 2009 1:21 PM

There was an article in Mainline Modeler where the author did a mobile crane conversion.  He used 0.030 brass wire instead of thread.  The effect was very good, except that I thought the wire looked heavier than what I thought would be prototypical.  Looking up 0.030 on a conversion chart I found on line, this diameter would equate to 2.61 inch.  You mentioned 0.006 diameter wire.  This equates to about 1/2 inch diameter.  I think you could get away with 0.012 wire, which is about 1 inch in HO.  The article author indicated that he had glued the wire to the pulleys, but I couldn't tell if he used a continuous piece of wire, or used segments and went pulley to pulley.

Thinking about alternate methods (using thread for the cables), graphitehemi above suggested always having something hanging from the hook.  Expanding on this a bit, you could make some detachable (unhookable?) loads out of some suitable small steel object.  If you have the hook hanging over, say, a scrap pile, you could bury a small magnet in the scrap.  The magnet would attract the object on the hook and keep tension on the cables, keeping the thread straight.  If you have magnets buried at various places under the crane, you could move the crane from place to place to vary the scene.

Just an idea.

Now I'll go re-light whatever it was I was smoking when this idea hit me.

  • Member since
    July 2006
  • From: Oconto Falls, WI
  • 240 posts
Posted by graphitehemi on Wednesday, March 25, 2009 5:57 AM

How about...... always have something suspended from the crane! WhistlingSmile,Wink, & Grin

  • Member since
    January 2009
  • 57 posts
Posted by grinstuff on Tuesday, March 24, 2009 9:31 PM

piano wire maybe

  • Member since
    July 2006
  • From: Central Vermont
  • 4,565 posts
Posted by cowman on Tuesday, March 24, 2009 9:10 PM

Could you tie a piece of thread onto a small nut, hook the loop of thread over the hook to hold it down?

Good luck,

  • Member since
    August 2004
  • From: Amish country Tenn.
  • 10,027 posts
Posted by loathar on Monday, March 23, 2009 11:36 PM

One hook is metal and the other's plastic. Both are too small too add weight to. I found some smooth thread that hangs straight, but it's so thin you can hardly see it. I can't make my lines very long or they tend to twist up. (one hook requires 4 lines run to it.) Guess I'll spend $2 and try a guitar string tomorrow and see how that works.
My kingdom for a decent LHS!!

  • Member since
    July 2006
  • From: Oconto Falls, WI
  • 240 posts
Posted by graphitehemi on Monday, March 23, 2009 7:47 PM

loathar
I've used waxed thread and that lycra sewing thread, but the hooks don't have enough weight to hold the lines taunt.

Is the hook large enough that you could drill out some of it and hide a fishing weight in it? Have you thought about replacing the hook all together with a metal hook?

As for riging I don't know of anything that would work better than the threads. Confused

  • Member since
    July 2006
  • From: Central Vermont
  • 4,565 posts
Posted by cowman on Monday, March 23, 2009 7:46 PM

I've got a couple of those on my "to do" list.  How about attaching a weight to  the hook to hold the line straight, maybe a little glue on the string to keep it straight once it has dried.  Just a thought.

Good luck,

  • Member since
    August 2004
  • From: Amish country Tenn.
  • 10,027 posts
Crane Lines
Posted by loathar on Monday, March 23, 2009 6:43 PM

I'm building this Walthers overhead crane.
http://www.walthers.com/exec/productinfo/933-3102
I'm having trouble stringing the hook lines. I've used waxed thread and that lycra sewing thread, but the hooks don't have enough weight to hold the lines taunt. I'm almost ready to try an .006 guitar string. (no local source for brass wire) Any thoughts on using this or any other ideas??

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