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Subject: 
Re: Drawbridge help needed!
Newsgroups: 
lugnet.build
Date: 
Thu, 28 Mar 2002 01:30:13 GMT
Viewed: 
343 times
  
In lugnet.build, Pedro Silva writes:
Hi all,

So, now I need to devise some counter-weights. The thing is, they must allow
the movement of the bridge, and so far all my attempts have failed in this
particular point.

Has anyone made some bridges like this, that I can use as reference? Mainly
for the *shape* to use.

Some data about the bridge:
Span: about 64 studs (previous version was 32, but was too small to be useful)
Width: 18 studs
Height: just enough to let a metroliner pass
Height *to the ground*: not defined, but as low as possible. Minimum of 8-9
bricks, to allow the movement of the counter-weight (any solution below this
limit is most welcome!).

My earlier attempts with Pneumatic cylinders failed. The use of a motor now
seems the cleverest option... but if you know different, please hint me
about it. I am really trying hard to do this bridge, and display it in
PLUG's August meeting.

You can get LEGO weight elements (9936) from Pitsco. Very handy. Also, the
counterweight doesn't have to go below the bridge - you can use cables with a
pulley system, or something like this bridge at Constitution dock
http://www.adagiomarine.com/year2001/images_hobartdocks/F00012.html. I wish I
had a better shot of this - the bridge is in the bottom right, the
counterweight is the large concrete block at the top of it - traffic passes
underneath this.

HTH

ROSCO



Message has 2 Replies:
  Re: Drawbridge help needed!
 
(...) LEGO weights are great but can cost some bucks, $4.95 a pair (2K2 catalog) and that excludes shipping. (Save the money for Technic beams) Low cost alternative, and I've heard the train guys mention this, roll of pennies. Just make a container (...) (22 years ago, 28-Mar-02, to lugnet.build)
  Re: Drawbridge help needed!
 
(...) I thought of using old "D-size" batteries; I used 4 of them, but they were not even close to enough. I'm thinking of placing them higher, and maybe "covering" the track with them - but, like I said earlier, space may become a problem. My dad (...) (22 years ago, 28-Mar-02, to lugnet.build)

Message is in Reply To:
  Drawbridge help needed!
 
Hi all, I am currently building a small drawbridge for my train using Technic elements, but I came across a difficulty which I was not expecting to be so problematic: the need of a "counter-weight". I did know I was *probably* gonna need one. And (...) (22 years ago, 28-Mar-02, to lugnet.build, lugnet.trains, lugnet.loc.pt)

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