Subject:
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Re: MOC: BR52 Steam Locomotive
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Newsgroups:
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lugnet.trains
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Date:
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Mon, 26 Mar 2001 14:17:53 GMT
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Viewed:
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545 times
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Hi Holger,
Thanks for your comments. I'll try and describe the linkage mechanism a bit
better, referring to this picture:
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=38770
All of the wheels are attached to technic axles. This was accomplished by
attaching large grey pulley wheels on the inside using technic pins-with-studs,
and running the technic axle through the center of the pulleys.
The rear three axles (the grey and black wheels) are all geared together using the
medium spur gears (what are they, 16 teeth?) so that they have to move in unison -
I found that when they were allowed to move separately they could slip a little and
the linkage would bind. These three axles are all mounted as one "group", and are
allowed to rotate about a turntable located above the center wheel.
The other two main axles (the white wheels) are mounted together as well. Both of
them are free, and have some wiggle room - that is to say, the technic axle that
they are attached to on the other side can slide back and forth in the technic beam
they are mounted in. Additionally, they also rotate using a turntable.
The dark grey technic linkage is mounted on a ball pin on each end, so it also has
some freedom out of the plane of its primary motion. The main piston that enters
the cylinder is constrained by the guide shaft located above it , so it can only
move horizontally.
When going around a curve, the front two axles just barely have enough room to
rotate without interfering with the piston. I alos have the small technic rubber
bands on all of the drive wheels to provide a little more friction and reduce
slipping.
I'll try and take some pictures of the mechanism this evening ...
thanks again!
shaun
Holger Matthes wrote:
> Hi Shaun,
>
> FANTASTIC model you have build out of our favorite bricks! And thanks for the
> describtion in your posting! The quality of first ever build serious MOCs is
> getting better and better!
>
> I am wonderring how the pistons works even when the engine negotiate curves? Is
> it right, that only the last 3 wheels are conected to the piston system? And
> these wheels are fixed together in a structure?
>
> Will you go for some (pre- / post-) war waggons as well?
>
> Keep on bricking!
>
> Regards from Germany,
>
> Holger
>
> > http://www.brickshelf.com/cgi-bin/gallery.cgi?f=3880
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Message has 1 Reply:
 | | Re: MOC: BR52 Steam Locomotive
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| Shaun, You've built an absolutely stunning locomotive. I am really really impressed with the details and engineering solutions you've showcased. later, James Mathis (...) pins-with-studs, (...) the (...) unison - (...) little and (...) are (...) (...) (23 years ago, 26-Mar-01, to lugnet.trains)
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Message is in Reply To:
| | Re: MOC: BR52 Steam Locomotive
|
| Hi Shaun, FANTASTIC model you have build out of our favorite bricks! And thanks for the describtion in your posting! The quality of first ever build serious MOCs is getting better and better! I am wonderring how the pistons works even when the (...) (23 years ago, 26-Mar-01, to lugnet.trains)
|
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