🚄 Low-Pressure Tube Pod Lab: Kantrowitz Limit, Drag and Tube Pressure — 2D Longitudinal Section and Kantrowitz Limit

2D companion of the low-pressure tube pod lab: longitudinal section with air density, end view of the blockage ring, flow profile, power against speed, Kantrowitz limit and top speed against tube pressure, using the same physics module as the 3D page.