Sumiride 0/500 Fore-and-Aft airspring characteristic tests (TM-DOS-016)

1. INTRODUCTION 1.1 The "Fore-and-Aft Sumiride" air spring is constructed on the "Flex-air" principle wherein secondary suspension control is given in all three major planes of operation. The spring is the one proposed for use on the A.P.T. Prototype trains and to this end the H4X bogies on Lab.