The Journal of Aerospace Engineering is a forum for the communication of ideas and methods presently in use at the forefront of technology in the field of aerospace engineering. It contains papers on both theoretical and practical aspects of all types of civil and military aircraft and spacecraft and their support systems. The scope is wide, covering research, design, development, production, operation, servicing and repair, components and auxiliary equipment, safety and reliability. The scope extends to: Structural and mechanical design; fluid dynamics and aerodynamics; propulsion systems and fuels; transmission and landing systems; tribology, hydraulics and pneumatics; testing and performance; flight control systems and avionics; manufacturing and quality assurance; materials.