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).
Clutch lining tests for a Bentley, detailing the method and results.
| Identifier | ExFiles\Box 141\3\ scan0253 | |
| Date | 13th February 1934 | |
| 13.2.34. CLUTCH LINING TESTS - BENTLEY. Method of Test. All linings initially subjected to 260 slips from 3000-2000 r.p.m. full throttle in batches of 20, and then slipped from 3000 to 500 r.p.m. in batches of 10 till total wear is 0.100". Average number of slips per hour - 80. Results. Lining | Wear due to 260 3000-2000 slips | Additional slips 3000-500 to produce total wear of 0.100" | REMARKS. --- RAD.13 as rec'd.{John DeLooze - Company Secretary} | 0 | 85. | Very bad slipping and smoking throughout 3000-500 r.p.m. Slips. RAD.5 as rec'd.{John DeLooze - Company Secretary} | 0.004 | 570 | Very bad slipping and smoking throughout 3000-2000 slips and first 50 of 3000-500 slips. -do- | 0.010 | 380 | RAD.11 as rec'd.{John DeLooze - Company Secretary} | 0 | 477 | Very bad slipping and smoking throughout 3000-2000 slips and first 10 of 3000-500 slips. RAD.11 1½ hrs. at 600°F.{Mr Friese} | 0.006 | 310 | Clutch behaved perfectly throughout 3000-2000 slips. Bad slipping and smoking during first 40 3000-500 slips. RAD.11 1 hr at 700°F.{Mr Friese} | 0 | 380 | Clutch behaved perfectly throughout 3000-2000 slips and first 7 of 3000-500 slips. Slipped and smoked from 8th to 30th of 3000-500 slips. | ||