Subject:
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Re: New Tower Crane
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Newsgroups:
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lugnet.technic
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Date:
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Mon, 27 Aug 2001 17:20:41 GMT
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Viewed:
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1119 times
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In lugnet.technic, Andrew Bissell writes:
> I have just updated my web site with a new tower crane built a few weeks
> ago. I would very much appreciate your comments.
>
> Something I am interested to know is what type of string you use for your
> crane winch? I used Carpet Stiching Twine for it's strength however it has
> a lot of twist and consequently I was not able to make a 1 to 4 winch as
> without a fairly substantial weight on the hook the whole thing became tangled.
I haven't found any good string either. I've used simple cotton thread and
also nylon rope. Both types have residual "twist" that effects your block,
particularly when it's lowered all the way and the string length is long.
I suppose you'll have the twisting problem with any small string used. One
thing that will help is to part your block 4 or more times. By having your
block (and hook) hanging by multiple strings, the residual twist on
individual strings can sometimes cancel each other out. Your block (and
hook) then hangs without twisting much.
Of course, to be safe you can part it 20 times like I did with my crawler
crane ;-) Then it takes 1.5 hours to completely raise up the hook instead of
15 minutes.
TJ
www.texbrick.com
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Message has 2 Replies:
 | | Re: New Tower Crane
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| Oh duh, I forgot to say a few other things. Nice Job! The crane looks good. Keep us informed of your progress in the modifications, I look forward to it. What loads have you tried lifting? To all those saying, "blah, another crane?". I say, "you can (...) (23 years ago, 27-Aug-01, to lugnet.technic)
| | | Re: New Tower Crane
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| (...) Awesome crane! As for string, I've been using a special fishing line I discovered. Unfortunately I'm not a fisherman so I can't describe what its for but I can tell you what it looks like. Its a black braided thread, much like lego string. Its (...) (23 years ago, 29-Aug-01, to lugnet.technic)
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Message is in Reply To:
| | New Tower Crane
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| I have just updated my web site with a new tower crane built a few weeks ago. I would very much appreciate your comments. Something I am interested to know is what type of string you use for your crane winch? I used Carpet Stiching Twine for it's (...) (23 years ago, 27-Aug-01, to lugnet.technic)
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