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).
Request to replace unit Y4BB with a B-3 unit due to roughness and to investigate the cause.
| Identifier | ExFiles\Box 90\1\ Scan121 | |
| Date | 18th February 1935 | |
| To RHC.{R. H. Coverley - Production Engineer} +261 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}10/KW.18.2.35. B-23-AE. Will you please remove unit Y4BB from this car and replace by B-3 unit which is fitted with your latest high lead content lead bronze bearings. With regard to Y4BB unit, this has become excessively rough; we are particularly anxious to find out the cause thereof. Will you please check the flywheel and clutch for balance when removed from the car, and also give us some information with regard to the condition of the main bearings and slipper wheel. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||