[mypalmike]

What about one where you feel that, acting in various directions, at every curve, every speed transition, and every elevation change. Because that's the "barf ride" being discussed, not merely getting thrown to the back of your seat during initial acceleration.

[taneq]

That sounds even more fun. :D

Although as the poster mentioned below, a passenger service would gradually rotate the passenger compartment to keep the G-forces vertical, a la a banking aircraft, so all you'd likely notice would be feeling heavier for a few seconds.

[Lazare]

The "barf ride" comments were the result of calculations which included rotating the passenger compartment.

See https://pedestrianobservations.wordpress.com/2013/08/13/loop... linked from the original article.

[taneq]

Interesting link, thanks! I should have clicked more on the original article. :)

This seems to be the comment in question:

> This is worse than sideways acceleration: track standards for vertical acceleration are tighter than for horizontal acceleration, about 0.5-0.67 m/s^2, one tenth to one seventh what Musk wants to subject his passengers to. It’s not transportation; it’s a barf ride.

I find the statement that vertical acceleration is 'worse than sideways acceleration' to be highly suspect (otherwise why would you bother to bank into turns?) - I would guess that the track standards are for +/- 0.5ms^-2 and mostly target short-period up-and-down bouncing motions rather than smoothly applied upwards acceleration.

[mypalmike]

The analysis suggests that the speeds involved would require a few minutes of said g-forces, not seconds.