Is a Hurdy gurdy a aerophone?

No, a hurdy-gurdy is not classified as an aerophone. It is a stringed instrument that produces sound through the vibration of strings, which are manipulated by a wheel that is turned by a hand crank. While it does involve the use of air, primarily through the use of a drone string and resonating body, its primary sound production mechanism is based on string vibration, placing it in the category of chordophones.