Straight-twin Engine - Aviation Use

Aviation Use

Inline-twin engines, such as the Hirth 2704 are commonly used in Ultralight, single seat gyrocopters and small homebuilt aircraft originally sourced from snowmobiles. Another popular inline-twin two-stroke engine was the Cuyuna 430-D, also a modified snowmobile unit which produced 30 hp (22 kW). More modern Ultralights tend to use engines such as the Rotax 503 or Rotax 582 which are designed for the purpose.

Inline-twin engines are sometimes also used in large scale flying model aircraft.