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Origyptian Wrote:
-------------------------------------------------------
> Tsurugi Wrote:
> --------------------------------------------------
> -----
> >
> >...The upper part of the ruts should widen
> > during sharper turns, because of the large
> > diameter wheels, but they don't. For this same
> > reason, the ruts in stone would break cart
> wheels
> > when they hit a turn that wasn't extremely
> > gradual.
>
> I, too, thought of that as we looked through all
> those photos. Even if the cart had a front axle
> with a steering mechanism, then when negotiating a
> curve, the rear wheels would attempt to cut into
> the radius of the front wheel curve. On the other
> hand, if all the wheels were caught in deep
> grooves, the cart motion would lock-up part way
> through the turn. It might be possible for a
> wheeled cart to make such uniform tracks on a
> curve if both axles had steering
> mechanisms with the rear axle perfectly
> compensating for the turn radius of the
> front axle. But I just don't think that's a
> plausible explanation of those tracks.
>
>
> > The ruts are artificial, but it seems highly
> > unlikely they were powered by animals or
> people.
> > Maybe sails? lol. I dunno.
>
> Totally agree.
>
> No matter how you slice it, the tracks simply do
> not conform to the logic of a wheeled cart. And
> that doesn't even consider how the "vehicle" was
> powered, especially if it was heavy enough to
> cause that kind of uniform deep rutting. Besides,
> what are the chances the any cart would follow
> exactly the same track right each time? It's
> virtually impossible that those tracks were made
> into solid rock by passing over the exact same
> path and knocking off a few molecules of stone
> with each passing. In the very least, if these
> troughs were caused by a wheeled vehicle, then
> you'd see a wide, shallow trough that eventually
> narrows as it depends with further wear, but
> that's not what we see.
A centrally pivoted bogie??
[en.wikipedia.org]
-------------------------------------------------------
> Tsurugi Wrote:
> --------------------------------------------------
> -----
> >
> >...The upper part of the ruts should widen
> > during sharper turns, because of the large
> > diameter wheels, but they don't. For this same
> > reason, the ruts in stone would break cart
> wheels
> > when they hit a turn that wasn't extremely
> > gradual.
>
> I, too, thought of that as we looked through all
> those photos. Even if the cart had a front axle
> with a steering mechanism, then when negotiating a
> curve, the rear wheels would attempt to cut into
> the radius of the front wheel curve. On the other
> hand, if all the wheels were caught in deep
> grooves, the cart motion would lock-up part way
> through the turn. It might be possible for a
> wheeled cart to make such uniform tracks on a
> curve if both axles had steering
> mechanisms with the rear axle perfectly
> compensating for the turn radius of the
> front axle. But I just don't think that's a
> plausible explanation of those tracks.
>
>
> > The ruts are artificial, but it seems highly
> > unlikely they were powered by animals or
> people.
> > Maybe sails? lol. I dunno.
>
> Totally agree.
>
> No matter how you slice it, the tracks simply do
> not conform to the logic of a wheeled cart. And
> that doesn't even consider how the "vehicle" was
> powered, especially if it was heavy enough to
> cause that kind of uniform deep rutting. Besides,
> what are the chances the any cart would follow
> exactly the same track right each time? It's
> virtually impossible that those tracks were made
> into solid rock by passing over the exact same
> path and knocking off a few molecules of stone
> with each passing. In the very least, if these
> troughs were caused by a wheeled vehicle, then
> you'd see a wide, shallow trough that eventually
> narrows as it depends with further wear, but
> that's not what we see.
A centrally pivoted bogie??
[en.wikipedia.org]
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