From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Graph comparing the performance of Studebaker and Humber dampers by plotting amplitude versus engine RPM.
| Identifier | ExFiles\Box 124\2\ scan0066 | |
| Date | 13th March 1940 guessed | |
| B 60 STUDEBAKER DAMPER 45-50 RUBBERS HUMBER DAMPER 50 LBS INS FRICTION TORQUE ENGINE R.P.M. AMPLITUDE DEGREES FIG. 3 | ||