ユニフロー掃気ディーゼルエンジンを開発したのは誰？
The Napier Deltic engine is a British opposed-piston valveless, supercharged uniflow scavenged, two-stroke Diesel engine used in marine and locomotive applications, designed and produced by D. Napier & Son. Unusually, the cylinders were disposed in a three bank triangle, with a crankshaft at each corner of the triangle.
D. Napier & Son