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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 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.
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?
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 :-)
Greetings from Switzerland
Beat
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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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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.
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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 old Dacta set, this idea was used to build a chain saw with the narrow
track links.
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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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Looking forward to it.
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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.
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No, I haven’t. So far I haven’t become a world club member. Is it worth to do
so, except for the magazine?
Or is there a place on the net where a digital version of the club magazine can
be downloaded?
Beat
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In lugnet.technic, Beat Felber wrote:
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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.
|
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 old Dacta set, this idea was used to build a chain saw with the narrow
track links.
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In my crawler crane I used axle pins with 1/2 bush on them, see
here.
These didnt really rotate much either, but the bush fitted nicely in the centre
of the tracks keeping them nicely aligned. Of course mine wasn’t motorised...
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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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Looking forward to it.
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This may be helped by the above method - there’s a lot of sideways movement of
the tracks when turning, which is probably a major contributor to the
stretching. Do the treads come apart more easily after the stretching? And does
it stretch to the limits of the spring loaded gears?
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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.
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No, I haven’t. So far I haven’t become a world club member. Is it worth to do
so, except for the magazine?
Or is there a place on the net where a digital version of the club magazine
can be downloaded?
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If not can someone do a scan of this page and post it please?
Regards
ROSCO
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beat.felber@fhso.ch (Beat Felber) wrote in <HpC78s.1szu@lugnet.com>:
> > 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.
>
> 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 old Dacta set, this idea was used to build a
> chain saw with the narrow track links.
The disadvantage of this construction is that the track links are liable to
snag on the edges of the plate.
--
Harro de Jong
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Hello
Could you please let us know when you have posted the CAD files. I would love to
build one.
Thanks
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