Coke Bottle Engine


This engine is from a PM Reasearch casting kit, seen below.


This was a project loaded with troubles.  




 This was one of my most difficult casting kit builds.  The main casting was not properly annealed and many of the blueprint specifications were missing or simply wrong.  The lay of the mainshaft was far from level causing me to cut the bed down and create my own bearings and mounts.  Perseverance and a bit of ingenuity finally got it running.  It clocked in at 1000 RPM on 15 psi of air which is not too bad given the long stroke and heavy flywheels.