Concept Investigation of 'W' Tailless Configuration

A new concept of ‘W’ tailless aerodynamic configuration was presented in this paper. This configuration is designed based on the flow behavior of forward-swept wing (FSW) and the flow control concept. It adopts blended high swept side-strake body design technique and adapts to high subsonic and maneuverability aircraft. By numerical simulation, Flow mechanism and aerodynamic characteristic of ‘W’ configuration and referenced FSW configuration are investigated. ‘W’ configuration shows excellent longitudinal aerodynamic performance. Both of yaw and roll are unstable, however, the moment values are small. The roll stability can be achieved above medium angle of attack, and yaw stability can be improved with proper aerodynamic ways by use of FSW’s favorable outboard wing stall performance. The results show that ‘W’ tailless configuration takes on excellent aerodynamic characteristics. Its design idea is reasonable and has a good develop foreground.