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).
Results of wear tests on various clutch linings for a 25 HP & Bentley clutch.
| Identifier | ExFiles\Box 85\2\ scan0082 | |
| Date | 3rd May 1934 | |
| -3- HS{Lord Ernest Hives - Chair}/FHH. 20/KW. 3. 5. 34. Clutch Lining Wear Tests - 25 HP. & Bentley. Type of lining. Wear due to 260 2000-3000 r.p.m. slips. Additional slips 500-3000 to produce total wear of 0.100". Remarks. Standard 25 HP. and Bentley Clutch. RAD.13 Untreated 0 65 Very bad slipping and smoking throughout 500-3000 slips. RAD.5 Untreated -Ditto- repeat. 0.004 570 Very bad slipping and smoking throughout 2000-3000 slips and first 50 of 500-3000 slips. 0.010 380 RAD.11 Untreated X. standard. 0 477 Very bad slipping and smoking throughout 2000-3000 slips and first 10 of 500-3000 slips. RAD.11 1+ hrs. at 600°F.{Mr Friese} 0.006 310 Clutch behaved perfectly throughout 2000-3000 slips. Bad slipping and smoking during first 40 500-3000 slips. RAD.11 1 hr. at 700°F.{Mr Friese} 0 380 Clutch behaved perfectly throughout 2000-3000 slips and first 7 of 500-3000 slips. Slipped and smoked from 8th to 30th of 500-3000 slips. | ||