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).
Examination of returned pistons suffering from 'scuffing' and a proposal for using tin plating to prevent future seizures.
| Identifier | ExFiles\Box 100\3\ scan0141 | |
| Date | 20th July 1938 | |
| To GWH.{George W. Hancock - Head Chateauroux}. from BY.{R.W. Bailey - Chief Engineer} BY.10/N.20.7.38. Pistons ex Pass & Joyce - B.94.BN.{W.O. Bentley / Mr Barrington} & Sykes McLean. - B.57.EJ. ---------------------- I have examined the two pistons you returned from the above cars, and in each case it is fairly clear the trouble was due to "scuffing" in the early stages of running, which eventually resulted in seizure. It is appreciated in the case of Sykes McLean B.57.EJ. that the car had run some 7,300 miles since the new pistons were fitted. This only serves to confirm our opinion that a piston which is "scuffed" in the preliminary running in is always a potential danger. The adoption of tin plating will considerably reduce the risk of "scuffing" when new pistons are fitted, coupled with a recommendation to the customer not to exceed 3,000 r.p.m. for the first 200 to 300 miles. BY.{R.W. Bailey - Chief Engineer} | ||