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Thread: Could you guess propulsion system type by sound?

  1. #1 Could you guess propulsion system type by sound? 
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    Could you guess what type of propulsion this one bus uses by its sound?
    https://www.youtube.com/watch?v=Zoiw...cqzOhp0AOODmim

    This one and the next video where it is a green one and shown from outside.


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  3. #2  
    Genius Duck Moderator Dywyddyr's Avatar
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    http://www.capstoneturbine.com/_docs...lza_lowres.pdf

    In answer to your question: I'd say "not really".
    Not too long ago someone (completely forget who) brought out a new motorbike (in the supersport range). But it was a high-revving four-stroke engine (about 75% more rpm than a "standard" supersport). Damned thing sound like a jet fighter, even at idle.


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  4. #3  
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    Personally, I like the sound. It feels like "riding" a Boeing.
    Though I disagree with their statement it is less noisy than a Diesel.
    It produces more noise in high frequencies. But sounds funny.
    How did you find the specs so soon? Are you familiar with that model?
    Last edited by Stanley514; July 18th, 2014 at 09:51 PM.
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    Genius Duck Moderator Dywyddyr's Avatar
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    I'd never heard of it until I saw the Youtube link.
    But a Google search for "Trolza Ecobus" came up trumps straight away.
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  6. #5  
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    Here is one more video with this one bus. I wonder, how passengers suppose to tolerate this screaming noise?

    https://www.youtube.com/watch?v=7Z41bl5uTnM
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