Overview of LEGO Compressed Air Engines

These are LEGO engines that use a source of high pressure low volume air. These are primarily LEGO Pneumatic Engines, however some LEGO High Volume Low Pressure Engines, also can use an air-compressor as a source of air flow when the air-tank is large enough to supply air at high volume. Some fake engines have been modified to accommodate pneumatic hose and working using non-LEGO schrader valves to control the airflow and create a two-stroke cycle. These engines are sometimes referred to as LEGO pneumatic fake engines (LPFE).