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  1.  
    Yes, I'm getting tired of these incessant promises.
    • CommentAuthorAsterix
    • CommentTimeNov 9th 2019
     
  2.  
    The comments are most revealing
    • CommentAuthorAsterix
    • CommentTimeNov 9th 2019
     
    Toyota has been pushing this technology for fleet use. I'm not sure, but I believe they're depending on the H₂ source coming from PV driven electrolysis, rather than from CH₄ cracking. It's notable that they have a small fleet of Kenworth trucks also.
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      CommentAuthoraber0der
    • CommentTimeNov 9th 2019
     
    We have some fuel-cell buses in hamburg.
    https://berlinspectator.com/2019/08/29/hamburg-hvv-to-purchase-530-electric-buses/

    They are loud and steamy. (not as loud as their diesel counterparts but still orders of magnitude louder than the tire noise of those BEVs)
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      CommentAuthoraber0der
    • CommentTimeNov 9th 2019
     
    Speaking of public transport, modern buses out-accelerate my non-military personal transport by a factor of almost 1.7, if I guessed it right.
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      CommentAuthorAngus
    • CommentTimeNov 9th 2019
     
    Posted By: aber0derThey are loud


    What is the noise? They should be no noisier than an EV, since that is what they are, just getting the E from a fuel cell (which should be silent except for Apollo 13)
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      CommentAuthoraber0der
    • CommentTimeNov 9th 2019 edited
     
    Posted By: Angus
    Posted By: aber0derThey are loud


    What is the noise? They should be no noisier than an EV, since that is what they are, just getting the E from a fuel cell (which should be silent except for Apollo 13)


    They are blowing lots of water vapour. And maybe there is also some cooling needed but yes, they are almost as loud as ICE buses.
    •  
      CommentAuthoraber0der
    • CommentTimeNov 9th 2019
     
    Of course, this(my observation) was around 2015.
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      CommentAuthoraber0der
    • CommentTimeNov 9th 2019
     
    •  
      CommentAuthorAngus
    • CommentTimeNov 9th 2019
     
    It does seem noisy, but it's hard to separate out the other traffic.
    •  
      CommentAuthoraber0der
    • CommentTimeNov 9th 2019
     
    It is also a different frequency range and all that. But they are not as silent as I've expected.
    •  
      CommentAuthoraber0der
    • CommentTimeNov 10th 2019
     
    Also the tonality bears some similarity to BSG's cylon fighter ships.
    • CommentAuthorAsterix
    • CommentTimeNov 10th 2019
     
    Posted By: aber0derhttps://youtu.be/XcyPhA1hWWc?t=123


    Are those fuel-cell powered or just rechargeable batteries? ("Batteriebus")
    •  
      CommentAuthoraber0der
    • CommentTimeNov 10th 2019
     
    The one at that timestamp is fuel cell, others are other. Most of them are diesel, of course. But there is at least one of every kind in that video.
    •  
      CommentAuthoraber0der
    • CommentTimeNov 10th 2019
     
    Even the one Batteriebus is louder than I would expect.
    • CommentAuthorAsterix
    • CommentTimeNov 10th 2019
     
    I wonder if that's by design.

    One of the issues that some of the states here are addressing is that EVs are too quiet and give no audible warning to the visually impaired. Various noisemakers have been proposed.
  3.  
    The battery plates are responding to the CMB, clearly. That's why they're noisy.
  4.  
    Stick a playing card between the spokes?
    • CommentAuthorAsterix
    • CommentTimeNov 10th 2019
     
    Posted By: alsetalokinStick a playing card between the spokes?


    A partially-inflated balloon also works well.