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).
Instructions for examining and testing machine insulation and components.
| Identifier | ExFiles\Box 51\1\ Scan099 | |
| Date | 4th September 1922 guessed | |
| -3- Contd. (8) Examine also for rubbing armature, slack bearings, cracked insulation, etc. (9) The insulation of the machine should be tested while still hot by applying through a lamp an alternating voltages of 200 between the windings and the frame, when the lamp should show no sign of being lighted. LINDLEY CROWLEY EFC. {E. Fowler Clarke - Electrical Engineer} | ||