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).
The mileage of Thermoid faced clutches in experimental Bentley cars.
| Identifier | ExFiles\Box 85\2\ scan0347 | |
| Date | 12th January 1938 | |
| To By.{R.W. Bailey - Chief Engineer} c. to Hs.{Lord Ernest Hives - Chair} 212 Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler}3/JH.12.1.38. re Thermoid - Bentley. The original Thermoid faced clutches in Exptl. Bentley cars, have covered the following mileages to date - B.23.AE. Fitted 24.6.37. 11,070. 3.B.IV Fitted 5.8.37. 10,625. 6.B.IV. Fitted 7.9.37. 6,906. TOTAL 28,601. The only one dismantled is 6.B.IV. at 6,900 miles and this shows no sign of ringing or grooving. Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler} | ||