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 17:23:04 GMT
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Viewed:
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641 times
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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
In lugnet.trains, Shaun Sullivan writes:
> 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 is in Reply To:
 | | Re: MOC: BR52 Steam Locomotive
|
| Hi Holger, Thanks for your comments. I'll try and describe the linkage mechanism a bit better, referring to this picture: (URL) of the wheels are attached to technic axles. This was accomplished by attaching large grey pulley wheels on the inside (...) (24 years ago, 26-Mar-01, to lugnet.trains)
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