Twin Cylinder Engine | Mechanical Engineering

A straight-twin engine, also known as straight-two, inline-twin, vertical-twin, or parallel-twin is a two-cylinder piston engine that has its cylinders arranged side by side and its pistons connected to a common crankshaft. Compared to V-twins and flat-twins, straight-twins are more compact, simpler, and usually cheaper to make, but may generate more vibration during operation.

Straight-twin engines have been primarily used in motorcycles, but are also used in automobiles and in Powersports applications. Automobiles with straight-twin engines are usually very small. Recent examples of cars with straight-twin engines include the Tata Nano and Fiat Group automobiles using the TwinAir engine.


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