Figure 4. In the rod rest frame (black), the vertical rail (green bold line) moves downwards, being thus contracted along its length. Instead, Major Tom (red) moves in the bottom-right oblique direction, so the MT coordinate system is contracted along that direction

From

Why and How Special Relativity Fails in the Second Spatial Dimension? An Introduction to the Preferred Frame Theory

Maciej Rybicki

International Journal of Physics. 2024, 12(4), 175-195 doi:10.12691/ijp-12-4-5