MM10 - The Coaxial engine

Technical details
Year of construction 2000
Power piston stroke 10 mm
  diameter 12 mm
Displacer piston stroke 10 mm
  diameter 15 mm
Flywheel  diameter 40 mm
  material brass
Idle speed 900 rpm
Energy source alcohol
Mass 1100g 


Identical to the approch chosen with MM09, I threaded my second spare Opitec cylinder (Where in the world had I first seen this?) with the idea of building a second small engine differing from its predecessor by a modified gear. The displacer cylinder is made of stainless steel with a brazed-on copper cap and brass flange.