Subject:
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Re: JCB JS220 Excavator
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Newsgroups:
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lugnet.technic
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Date:
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Mon, 1 Dec 2003 14:24:42 GMT
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Viewed:
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4589 times
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In lugnet.technic, Beat Felber wrote:
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When I saw the first pictures, I thought 1x6 tiles on the crawlers would look
great. But then I downloaded the action videos and had to realize that the
tiles would fall off quickly in such heavy duty applications.
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Very true. In addition to this, had I applied 1x6 tiles the superstructure would
have fouled on them when slewing, there was not enough clearance between the
superstructure and the tracks to allow the fitting of 1x6 tiles.
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It is most impressing to see your model move and dig (I would never dare to
use my creations in such harsh environments) - congratulations!
Although your site is - once again - very easy to follow and the pictures
show lots of details, there is something I couldn’t find out yet. It concerns
the track rollers. How have you built them to realize a smooth ride? Did you
use the 16 tooth clutch gears like TJ has in his R996?
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I used quite a few of the black technic “axle pin with friction” for rollers,
but in fact they don’t actually roll, the tracks just slide over them. It seems
to work quite well.
There is more history to the tracks than on the site though; after doing the
videos the tracks seemed to have stretched a bit and therefore came off quite
easily when turning corners. To remedy this I spring loaded the non-driven 24
tooth gears holding the tracks to keep them tight no matter how stretched the
tracks get, and it seems to work well. I’ll put some more information about this
on the website when I get the CAD stuff for it done.
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Just an idea for the case you should looking for your next challenge: what
about implementing drive, steering and a (remote) control to the 8455 backhoe
loader? You still could make it look like a JCB or a Case :-)
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:-)
Have you seen the latest lego club magazine? They have a competition in it which
links the 8455 and a real JCB backhoe.
Jennifer
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Message has 2 Replies:
 | | Re: JCB JS220 Excavator
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| (...) Never tried that one - nice space saving idea. What I tried some time ago was to use plates with the studs on the side so that the track runs over the edge of it. This allows to build very narrow track frames. If I remember right, in a very (...) (20 years ago, 3-Dec-03, to lugnet.technic, FTX)
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Message is in Reply To:
| | Re: JCB JS220 Excavator
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| Hi Jennifer It was definitely worth to wait for your newest marvel! It's wheter a CAT nor a Liebherr - finally a model that is truly different from what we've seen so far ;-) When I saw the first pictures, I thought 1x6 tiles on the crawlers would (...) (20 years ago, 30-Nov-03, to lugnet.technic, FTX)
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