A free piston moves under gas forces and rebound without a crankshaft fixing its motion. Hydraulic applications and hybrid-electric generation in specialised vehicles are offered as uses for the concept. Fewer parts and possible efficiency gains make it attractive in principle, while the participants stress limited tolerance for faults or poor maintenance. Alex explicitly limits his authority on the technical details: he approaches the subject as a historian of engineering and would prefer an engineer's explanation.
Notable Point · 4:08:43-4:11:04
Why free-piston engines remain a specialist technology
Crankless piston motion offers specialist hydraulic and generating uses, with maintenance limits and an explicit qualification about technical expertise.