By James O. Glanville
By Dr. Mark Sircus (Dr. Mark Sircus)
By S. Newman (Lecturer in Helicopter Engineering, Department of Aeronautics & Astronautics, Southampton University)
By Peter Walker (University of Bath UK)
By Halstead, Andrew, Greenwood, Pippa
By Nadine B Carozzi
By Charles Nicholas Mander
By Vic Parker, Collins Big Cat
By Smith, Peter, Begg, David
By David Coles
By M. M. J. Treacy, B. K. Marcus, M. E. Bisher, J. B. Higgins
By Jason Vale