What onomatopeia is ばたりばたり?


In Miyazawa Kenji's 銀河鉄道の夜 I came across this:

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    たくさんの輪転器がばたりばたりとまわり、...
    
[/code]

What is the meaning of ばたりばたり here? 輪転器 is a [rotary printing
press](https://en.wikipedia.org/wiki/Rotary_printing_press), I believe.

[バタバタ](https://japanese.stackexchange.com/questions/2253/what-
does-%E3%83%90%E3%82%BF%E3%83%90%E3%82%BF-mean?rq=1) comes to mind, so maybe
something close to that?




" ** _With a repetitive (and mechanical) flopping sound_** " would be my own
definition.

At least, that should capture the essence of the onomatopoeia in the given
context.




" ** _With a repetitive (and mechanical) flopping sound_** " would be my own
definition.

At least, that should capture the essence of the onomatopoeia in the given
context.

