Noun
gyrodyne (plural gyrodynes)
A kind of VTOL aircraft with a helicopter rotor-like system driven by its engine for takeoff and landing, as well as one or more conventional propellers to provide forward thrust during cruising flight
Following the public hearing and end of the public comment input later this month, the Smithtown Planning Board will await submission of a final environmental impact statement in preparation for a vote on the Gyrodyne applications. Source: Internet
Gyrodyne main Gyrodynes are also known as compound helicopters or compound gyroplanes. Source: Internet