How Dense?

In the last post I talked about the physics and considerations behind the gravity train. A crucial part of the calculations involves the average Earth density. This is what determines the period, or how fast the train will go. It also determines the pressure our tunnel must sustain, and the amount of work we must … More How Dense?

Grav Train

We all love flying: it’s both an exhilarating experience and a fast way of getting from place to place. But jet planes are gas guzzling beasts and produce immense amounts of CO2. Plus, it can take an entire day to fly around the globe; way too long for impatient businessmen. Here I would like to … More Grav Train