Engine cylinders cover the pressure vessels within reciprocating aero-engines — principally air-cooled and liquid-cooled piston-engine designs used in general aviation, UAV propulsion, and auxiliary power units — encompassing barrel forgings, cylinder heads, valve seats, ports, and fin geometries manufactured from aerospace-grade aluminium alloys, steel, and chrome-moly tubing, with processes including honing, nitriding, and thermal barrier coating.
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