Helicopters with Martin Anderson / Transport and equipment 15.04.2021 Messerschmitt-Bölkow-Blohm Bo 105 – a light, twin-engine, multi-purpose helicopter developed by Bölkow of Ottobrunn
History of engines with Martin Perez / Transport and equipment 17.01.2020 Allison V-1710: American liquid-cooled piston engine
