Mike D Wrote:
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>

Quote
Origyptian said
> "I think I understand. But this still doesn't
> seem to address the apparent non-horizontal slope
> of those "benches" with the cross striations, it
> doesn't address the apparent lack of wider tracks
> on curves to accommodate the wheel radius, it
> doesn't address why some tracks on horizontal
> ground show erosion between them while others do
> not, and it doesn't address the sidewall grinding
> that would occur on wheels that supported a heavy
> load along deep ruts in bedrock."
>
>

> For the benches slopes (in fact they are skew
> planes at two angles) I already gave you my
> opinion.
> For the curves radius, they seem to have been
> designed to avoid sidewall griding for a given
> wheel diameter (I couldn't measure curves radius,
> and neolithic wheel diameter can only be roughly
> estimated, very sorry), please have a look at this
> nice curve at Naxxar (not personnaly visited,
> sorry) :
>
> When a track became too deep, another was created
> (my opinion, just my opinion, not to convince you,
> thank you)

Track minimum radius could be dictated by a multi axle, four or more wheeled vehicle on a rigid chassis/wheelbase.
It's why they have swivelling bogeys on railway wagons.
A long rigid chassis can't negotiate tight curves.



Edited 1 time(s). Last edit at 30-Nov-17 12:44 by Jon Ellison.