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 showing power losses due to 1st and 2nd motion shafts for a PII Synchromesh gearbox under different oil conditions.
| Identifier | ExFiles\Box 15\5\ Scan282 | |
| Date | 7th May 1932 guessed | |
| P.II SYNCHROMESH POWER LOSSES DUE TO 1ST AND 2ND MOTION SHAFTS. TORQUE AT A = 96 LBS. INS. B = 65 LBS. INS. REQUIRING 15 LBS. ON LEVER TO CHANGE INTO TOP GEAR IO .. Q/H COLD OIL A B OIL AT 40°C NO OIL R.P.M. | ||