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).
Engine chirping issues and remedial actions taken on a 3-ring piston.
| Identifier | ExFiles\Box 19\7\ Scan018 | |
| Date | 19th February 1910 | |
| R.R. 134m (100 T) - S.H. 89. 7-7-20; G 1769 X.790. omitted Price's also Valvoline ENGINE - CHIRPS. Fixed 3-ring piston .006" top .002 bottom straight taper - 1200 car - 80 lbs. compression. Chirps got bad after 500 miles. Cleaned piston top - little better -still bad but improved Cleaned cylrs. all round. O.K. J.P. 19.2.10. | ||