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).
Difficulties with supercharger bearings.
| Identifier | Morton\M10\ img078 | |
| Date | 3rd April 1928 guessed | |
| E C Ho. By (Ram) Bq Super charger bearings - There is always great difficulty with beginners for high speed parts unless such parts have been put right by those who have [illegible] [illegible text] should get measurements & running fits with [illegible] of our 000 [illegible] Motor [illegible] | ||