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).
Specification memo for the clutch setting on 3.PER.II.
| Identifier | ExFiles\Box 169\4\ img182 | |
| Date | 13th January 1933 | |
| To R;C. from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} P2 - 6 unit Hs{Lord Ernest Hives - Chair}/Ra. 9/AT.13.1.33. Herewith specification of the clutch setting on 3.PER.II. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||