This picture was taken in the late 1980s. One train is going up the lift while another is going down the tube. As the cars descended down the metal trough, they made a very loud rumble. The ride sounded like rolling thunder when operating. There are presently nine operating bobsled coasters in the world, eight with steel troughs and one, Flying Turns, with wood track.
Intamin built five bobsled coasters:
©2017 by Joel A. Rogers.