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 insulation testing procedures for varnishes and paper.
| Identifier | ExFiles\Box 24\2\ Scan045 | |
| Date | 24th January 1919 | |
| ROLLS-ROYCE LIMITED. INSTRUCTIONS. Re: Insulation Testing (contd) For varnishes apply to metal foil giving two coats & allowing each to dry thoroughly. Tapes to be wound on 1" rod overlapping half their width, and a feeler passed over by an insulating handle. Specialized tests:— In addition to the above. a) Paper 1) Weigh a sample and expose to a damp atmosphere for a considerable time (all night). Re-weigh and note % moisture absorbed. 2) Dry in an oven at 100°C for 6 hours. Support the sample vertically in the (Contd) | ||