Tornado is a Vortex Lattice Method for linear aerodynamic wing design applications in conceptual aircraft design or in aeronautical education. By modelling all lifting surfaces as thin plates, Tornado can solve for most aerodynamic derivatives for a wide range of aircraft geometries. With a very high computational speed, Tornado gives the user an immediate feedback on design changes, making quantitative knowledge available earlier in the design process. The code is implemented in MATLAB and is being used at many universities and corporations around the world. It is still in a development phase with new functionality added. The code can either be run with a text based interface or in batch mode. The code is being developed as an international cooperation between universities, companies and private persons.