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).
Testing Thermoid facings on the 25/30 clutch to eliminate clutch jaggers.
| Identifier | ExFiles\Box 161a\2\ scan0036 | |
| Date | 26th October 1937 guessed | |
| 25/30 CONTD CLUTCH JAGGERS Thermoid facings, which have been so successful on P.III, are now being tested on the 25/30 Clutch. We are very hopeful that the introduction of this facing will result in the final elimination of clutch jaggers. The facing can of course, be fitted to existing clutch plates without modification. No.6. | ||