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).
Reporting on the examination of a 20 HP Monthly Production Dynamo X9F, noting a tight bearing causing stiffness.
| Identifier | ExFiles\Box 165\6\ img170 | |
| Date | 26th May 1928 | |
| X566 To Mr. Brock. EFC1/T26.5.28. 20 HP. MONTHLY PRODUCTION DYNAMO X9F. ----------------------------------- We have duly examined and tested this machine and find everything in order with one slight exception - that there is a slight stiffness in the armature rotation with the brushes up, which presumably is due to a slightly tight bearing. We return the machine herewith. EFC. | ||