Subject:
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Re: 4.5 Volt straight track (p/n 3228), different versions ?
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Newsgroups:
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lugnet.trains
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Date:
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Wed, 3 Jan 2001 23:49:48 GMT
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Viewed:
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1063 times
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In lugnet.trains, Manfred Moolhuysen writes:
>
> The old "blue" rail parts and the non-slotted "gray" parts are very different:
> Both ends of old "blue" track flange is tapered over a length simmilar to
> that of a 1 stud brick. This tapering (in a vertical direction) is normal
> positive at the top side of the flange and negative at the bottom side of
> the flange.
>
> See Ldraw part 3228A.DAT for this, and my earlier posting on this tread:
> http://news.lugnet.com/cad/dat/parts/?n=2159
I always figured the negative taper on the bottom of the old blue rails was to
allow hill crests - when attached to the 2x8 plate (sleeper) it allowed them to
tilt downwards without reducing greatly the "tightness" of the joint.
Dunno if this is actually the reason for it or not...
Regards,
ROSCO
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