SOLAR POWER TRAINING COURSE This is a follow-up STIRLING CYCLE ENGINE video to the Compressor Conversion. The original design required too much heat on the displacer side due to excess volume inside the piston. By adding a large displacer, you reduce the working gas volume and dramatically increase the surface area to the heat source. The piston attached to the displacer is exposed to 80% less heat than the previous design preventing damage to the rings, also reducing wear and lubricant breakdown. The heat sinked cylinder on the hot side is also saved from heat damage.