Aircraft Maintenance

David Allerton  is an Emeritus Professor at the University of Sheffield and Visiting Professor for Flight Simulation at Cranfield University, UK. He is currently a consultant to CnTech, a global developer of flight simulation software. Professor Allerton was a member of the Royal Aeronautical Society (RAeS) Flight Simulation Group for 25 years, serving 2 years as its chairman. He is the author of  Principles of Flight Simulation.