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Guess propulsion type by its noise

  1. Jul 19, 2014 #1
    Could you define what propulsion type this one vehicle uses by noise it makes?

    Last edited by a moderator: Sep 25, 2014
  2. jcsd
  3. Jul 19, 2014 #2


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    Judging by the poles along the route, (and some of the other videos listed on the youtube page) I guess it's a http://en.wikipedia.org/wiki/Trolleybus

    There were in use in a town about 30 miles from where I lived in the UK, back in the 1950s and 60s. They were remarkably noisy, for electric powered vehicles.
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