These Swiss railcars are self-contained units, powered by two Cummins diesel engines mounted underneath the seating area. They are diesel-pneumatic. Generators driven by the diesel engines provide the power to traction motors for the ascent. The braking is done through a pneumatic retardation system, and the diesel engines must idle on the return trip.
The view was awesome. The windy gusts blew my hat off my head. Feeling light-headed from the altitude I wasn't about to chase it to the edge of the cliff. It was frigid cold and felt like pure chaos as the wind whipped into a frenzy. They closed the auto road and we re-boarded for the ride down. Came across this article about peak oil. Wake up, wake up, up wake!