"John Tapper" schreef in bericht
om...
Is there *any* experimental evidence for it at all?

Accordingly to C.M. Wills in the Book "Was Einstein Right?"
at page 273:
"On the other hand, it is a rather difficult effect to see experimentally,
because it is hard to accelerate macroscopic rods to high enough
velocities to make the effect noticeable"
What this sentence implies that there is no direct experimental
evidence for length contraction.

IMO if you want to prove length contraction than you should set up
your experiment such that no time dilation is involved
i.e. no moving clocks within your reference frame.
i.e. no clocks attached to the moving rod.

Nicolaas Vroom