A two-stroke engine is a type of internal combustion engine that completes a power cycle with two strokes of the piston, one up and one down, in one revolution of the crankshaft in contrast to a four-
1966 Saab Sport
Lateral view of a two-stroke Forty series British Seagull outboard engine; the serial number dates it to 1954/1955
A Cox Babe Bee 0.049 in3 (0.80 cm3) reed valve engine, disassembled, uses glow-plug ignition. Its mass is 64 g.
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
The Deltic-powered Hunt-class mine countermeasures vessel HMS Ledbury
Napier-Deltic–powered British Rail Class 55 D9017 The Durham Light Infantry starting its engines at London King's Cross in 1966
Napier Deltic engine at the National Railway Museum, York