noun, noun which may take the genitive case particle 'no'
twin-engine; two-motored
Used for aircraft, vehicles, or machinery with two engines. Often appears as a noun modifier (双発の).
A twin-engine airplane can keep flying even if one engine stops.
This twin-engine aircraft has good fuel efficiency.
twin-engine aircraft; twin-engine plane
A compound of 双 “two, twin” and 発, an abbreviation of 発動機 “engine,” hence “equipped with two engines.”