Uploaded April 2012 | Updated September 2026, 2 hours ago
My Grandfather-in-law is a skilled machinist, and continues to tinker in his retirement. This is one of several of his small "projects". The coffee-cup engine is a version of a sterling engine and can use virtually any heat source that is warmer than the ambient air around the machine.
My Grandfather-in-law is a skilled machinist, and continues to tinker in his retirement. This is one of several of his small "projects". The coffee-cup engine is a version of a sterling engine and can use virtually any heat source that is warmer than the ambient air around the machine.
