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).
Light test of an R. Bosch sliding armature motor which resulted in overheating.
| Identifier | ExFiles\Box 64\2\ scan0147 | |
| Date | 5th April 1928 | |
| X762513 5.4.28. R.{Sir Henry Royce} BOSCH SLIDING ARMATURE MOTOR. X.7625B. X4562 Light test at 6 volts. After 5 mins. commutator end bearing got abnormally hot. Current 44 amperes. Speed. 4000 r.p.m. EFC. | ||