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).
Notice regarding the retention of the propellor shaft damper on 20/25 HP models.
| Identifier | ExFiles\Box 105\2\ scan0150 | |
| Date | 17th January 1936 | |
| x 537 To By.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}4/KW.17.1.36. Propellor Shaft Damper - 20/25 HP. Please note that if any clutch other than the Borg & Beck is fitted to the large bore 20/25's, the propellor shaft damper will have to be retained. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||