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 a temperature and voltage leakage test on a coil-case, comparing Stabalite and Redmanol materials.
| Identifier | ExFiles\Box 45\4\ Scan304 | |
| Date | 29th June 1920 | |
| ROLLS-ROYCE LTD. INSTRUCTIONS. To__________________________________ Order No.____________________________ Customer's No. S a coil-case in the oven, and. starting from about 30°c, applying increasing voltages for the leakage readings at each stage of 30°c temperature rise, up to 100°C. It will be seen that the Stabalite is practically leakless right up to 100°c., whereas the Redmanol always leaks well before this temperature is reached. The Stabalite case was found to be slightly soft immediately on removing from the oven at 100°c. In the table following, the readings for the maximum RMS voltage of 2,420 which was applied in each case are given. Signed ______________________________ (contd) This Sheet must be filed on completion of the work. Top left corner print: RR 238(150 BKS.) (BH57.29.6.20.) MP 22435B Top right corner print: 19____ | ||