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).
Test results table for various linings, detailing wear and performance under different temperature and slip conditions.
| Identifier | ExFiles\Box 141\3\ scan0254 | |
| Date | 2nd February 1934 guessed | |
| -2- Lining. | Wear due to 260 3000-2000 slips. | Additional slips 3000-500 to produce total wear of 0.100". | Remarks. --- RAD.11 2 hrs. at 700°F.{Mr Friese} | 0.006 | - | Behaved perfectly throughout 3000-2000 slips and first 4 of 3000-500 slips. Slipped and smoked from 4th to 40th of 3000-500 slips. Test discontinued. --- RAD.11 1 1/2 hrs. at 800°F.{Mr Friese} | 0.008 | 250 | Behaved perfectly throughout 3000-2000 slips and first 28 of 3000-500 slips. Slipped and smoked at 29th, 30th, 38th, 39th and 50th of 3000-500 slips. --- RAD.5 1 1/2 hrs. at 600°F.{Mr Friese} | 0.004 | - | Very bad slipping and smoking throughout 3000-2000 slips and first 50 of 3000-500 slips. Test discontinued. | ||