Topic summary
Flat-twin

Extracted from the Wikipedia article Flat-twin engine.
Flat-twin engines were also used in several aircraft up until the 1930s and in various stationary applications from the 1930s to the 1960s.
Topic summary

Extracted from the Wikipedia article Flat-twin engine.
Flat-twin engines were also used in several aircraft up until the 1930s and in various stationary applications from the 1930s to the 1960s.