After finishing the little Falk engine I took up the idea of the Heinrici
engine once more. I decided for the gamma type of this stirling engine. The
displacer cylinder is made of stainless steel, provided with a copper bottom
because of a better heat transfer. A cooling jacket surrounds its upper part and makes possible
an evaporative cooling. The steel power piston moves very smoothly in a brass
cylinder because of a dry graphite greasing. The crankshaft runs in ball bearings.