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bchrien

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Posts posted by bchrien

  1. chengkp75: Thank you for the information. Perhaps I was experiencing a beat frequency between the aft propellers or and interaction between the propellers and the resonant modes of the ship. At least I will know how to phrase my inquiry if I ever experience the issue again.

  2. I want to thank chengkp75 for his technical response. I noticed that you are a former cruise ship engineer. Do you happen to know the rotation frequency of the propellers? How about the diesel engines? The vibration that I felt could be a fundamental or some harmonic caused by a frequency difference. What I observed is that it seemed to be nearly constant from start to finish.

  3. For my crossing starting 1/3/17, the vibration started as soon as we started moving away from the Brooklyn Cruise Terminal and stayed roughly constant until we arrived at Southampton.

    I do not want to travel on QM2 again unless I can be assured that my cabin will not be affected by the vibration I experienced earlier this month.

  4. What is the source of ~15 Hz vibrations on the port side of QM2? It was bad enough on deck 11 aft that I couldn't read a book in my cabin. Does it come from the gas turbines located in one of the upper decks? Which cabins are most affected?

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