Wind tunnel experimental test and performance analysis for Bi-modal unmanned underwater and air vehicle

The B2UAS (Bi-modal unmanned underwater/air system) is a proposed unmanned vehicle concept that can operate in both air and water where the transition between the two fluids is assisted by a compressed gas thruster. To decrease underwater drag a variable sweep wing is deployed once the vehicle exits the water. Its application value is in both military and civil operations. Design of the composite vehicle with variable sweep wing is presented in this paper. Numerical analysis and wind tunnel tests were conducted to verify the flight characteristics and performance of the variable sweep wing mechanism. The B2UAS has stable flight characteristics and an effective wing sweep mechanism.