This is an interesting device, but while all the information is absolutely
fascinating, I'm much more curious as to how a self-propelled steam locomotive is travelling upside down, without us all falling to our untimely deaths.
At first, I thought perhaps it could be a series of
really strong magnets, but then I don't think the devices would work at all, and all the metal on the train would be stuck to the floor. People wearing jewellery would find it very difficult to get anywhere at all.
The only other explanation is that we are travelling in a
very large ellipse and inertia is pushing our bodies into the outside of the loop as the train spins around. But the loop seems to be far too large for us to maintain enough centrifugal force to keep gravity at bay, unless we are going
dangerously fast.
If you draw a free body diagram with zero normal force, the only force acting on the passengers is force gravity = m*g. So, if we apply Newton's second law then...
Fg = Fc,
m*g = m*v^2 / r
Solving for v:
v = sqrt(r*g)
Basically, it's going to have to be at
least nine mile a second, and I've never travelled nine miles in a second in my life. There are 3600 seconds in an hour, so we are currently travelling at least 32400mph.
That's impossible, or at least extremely improbable.
Either way, I need to go home now.