Wing device and flight vehicle having the same

A wing device for a flight vehicle comprising:

• a fixing shaft disposed in a lengthwise direction of a main body of the flight vehicle;
• a wing rotatably mounted to the fixing shaft so as to be deployed from a state of being laid on an outer circumferential surface of the main body to an erected state, and slidable along the fixing shaft;
• a fixing groove formed to face the wing in a sliding direction of the wing;
• and
• a spring unit configured to apply a first elastic force in an outer circumferential direction of the main body for deployment of the wing, and apply a second elastic force in a lengthwise direction of the main body for inserting the wing into the fixing groove in response to the sliding of the wing after the deployment of the wing,
• wherein a peripheral groove is formed at the main body in the outer circumferential direction thereof so as to accommodate therein the wing in the laid state,
• wherein a lubrication member is mounted onto a side surface of the peripheral groove in order to reduce a friction generated during deployment of the wing, and
• wherein the lubrication member is configured to cover the side surface of the peripheral groove, which is contacted by the wing.