Quote:
Originally Posted by tcar
They use dynamic braking... like regenerative braking on EV's to slow. Brakes the motors to brake the wheels.
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I wondered about that, given the statement in the article, "The contact surface per wheel on the rail head is barely 250 mm˛,
guaranteeing minimum frictional forces — the rolling resistance coefficient for steel on steel contact is, at its worst, 30 times lower than that of rubber on asphalt."
So with minimum friction between the wheel and the rail, it seems the ability to stop in an emergency using the wheels only (regardless of how they are retarded) would be limited.