Subject:
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Re: New (at least to me) optimal geometry for pneumatically flipped switches
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Newsgroups:
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lugnet.technic
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Date:
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Tue, 7 Oct 2003 18:37:04 GMT
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Viewed:
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2616 times
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In lugnet.technic, Mark Bellis wrote:
> In lugnet.technic, Kevin L. Clague wrote:
> >
> > Anyone else got some good geometries out there?
>
> I used the geometry from the alternative model of 8868 crane truck for a long
> time (this was a bin lorry). However, I found that raising the bottom end of
> the piston up off the beam that the valve is attached to is a good idea as it
> helps to stop the joint coming off the valve lever.
Hi Mark,
Do you have an image of the original geometry, and your modified version?
I could not find 8868 on BrickShelf's scanned library.
Kevin
>
> I have mounted the old style valves 1/2 stud below the beam using 2-hole 2-beams
> with the top hole attached to the main beam.
>
> The advantages of the new valves are:
> - The offset of the lever pivot centre from the valve mounting holes is the
> same at both ends.
> - The mounting arrangements allow valves back to back, as used on 8455, so the
> possible density of valves in logic systems increases, meaning that logic
> systems can fit into smaller spaces on models. I'm sometimes moving 8 or
> more valves with one set of cylinders (usually 1 cylinder for every 2
> valves).
The new valves are superior in my mind as well. Another plus is they require
less parts to mount them onto a technic beam.
>
> Mark
Kevin.
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