The manufacture of a prototype air spring pad, for APT-P (IM-FM-043)

Concern was felt that unacceptable amounts of distortion might occur as a result of welding the air spring support pad detailed on Drg No. 0 APD-P0269, and shown in sketch form in Fig 1 (more than 1 mm out-of-flat was considered to be undesirable). It was therefore decided to fabricate...