Patent ID: 8525089

Claim:
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.