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Are there any succesful solid fueled internal combustion engines? Particularily, ones that produce shaft power (not rockets and not ramjets)

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  • $\begingroup$ Steam rollers worked quite well - solid fuel as in wood or coal but wood may be more sustainable... $\endgroup$
    – Solar Mike
    Apr 5, 2020 at 16:48
  • $\begingroup$ I don't think steam engines count. Doesn't internal combustion mean it burns in the pistons? $\endgroup$
    – Transistor
    Apr 5, 2020 at 21:40

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over the years, people have tried running ICE's on coal dust. It is possible, but it's difficult to meter the dust into the engine's intake to get the proper mixture, and it's difficult to transport the dust from a fuel tank into the engine compartment.

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