A very striking comparison of the properties between a traditional coil spring and a pneumatic spring can be viewed using two .avi graphic movie files produced by and made available courtesy of:

       Professor Gordon P. Blair, CBE, FSAE, FREng, is Professor Emeritus at The Queen's University of Belfast. Professor Blair is the author of three textbooks on the design and development of two-stroke and four-stroke engines (SAE book references R-161 and R-186) and of over 100 technical papers in the same vein.   

COIL SPRING MODEL.AVI  1.8 Mb file size - showing the static vs. dynamic characteristics for a dual conventional coil spring assembly.

PNEUMATIC SPRING MODEL.AVI 1Mb file size - showing the static vs. dynamic characteristics for a gas spring assembly.