100 Year Old Model Airplane Engine

 

  100 yr old model airplane steam engine  
     

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It is not clear what the provenance of this little steam engine is.  It appears to be  a rotary valve engine with the valve being in the aft end of the crankshaft.  Note that the wooden propeller is still partially in place.  It appears to be a counter-flow engine and not the preferred uni-flow design.  Years ago steam engines were the only show in town and thus used for everything from running sewing machines to little model trains to building the Panama Canal.
  100 yr old model airplane steam engine  
 
  steam engine diagram-model airplane  
     
  airplane engine-steam powered 100 yrs old