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Yes I know, I should have done a video ... too bad !!! :( but I thought it was maybe a common related issue and that someone may have a clear explanation. I understand it's not so easy to know what it was, maybe I have to ask to Gerstlauer, for sure they should know what was the root cause of...

Thanks, I thought anti-rollback dogs were only preventing the cars from rolling back if the chain breaks when ascending the lift hill. When ascending the hill I heard the "click-clack" of the anti-rollback at the bottom and at the top of the hill, the sound level was very fine and was normal...

Hello, On the Gerstlauer roller coaster « Les Speed Rockets » in Paris at the « Jardin d’acclimatation » park, there was a very high level clunky metalic « clack » sound just before each car ascends the lift hill. As it occured before climbing, I think this sound was not related to the...