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https://www.frrandp.com/2021/02/the-impulsoria.html
Other than one prototype unit, however, the locomotive was never produced. By 1850, steam was clearly king, and any horse-powered railways outside of streetcar operations were on the way out. Thus, the Impulsoria became nothing more than a strange curiosity of an early railway engine.
The Wikipedia article talked about how well the trials went. I was wondering if any were actually used.