IN THIS ISSUE: Aerospace Engineering at Cornell /2 (With a distinguished history and vigorous research, Cornell looks to the future.) ... Experiments in a Microgravity Environment /4 (Experiments conducted in a falling package reveal processes that occur in space.) ... Modeling Secondary Propulsion Systems for Spacecraft /10 (Computer modeling is contributing to the design of more efficient control rockets.) ... On Board for Studies of Wake Vortex Dynamics: Undergraduates in a Research Environment /16 (Students play an active role in experiments at the forefront of fluid dynamics.) ... Computational Methods in Aerodynamic Design: The Difficulties and the Promise /23 (Computer simulations vie with wind tunnels in research aimed at minimizing shock waves over airfoils.) ... Simulating the Performance of Gas-Turbine Combustors /29 (In the development of better gas turbines, simulation is far cheaper than building test models.) ... How Wave Rotors Can Enhance Jet-Engine Performance /35 (It may be possible to increase the efficiency of fan jets while doubling their power.) ... Register /40 ... Faculty Publications /43