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).
Findings on engine bore wear and the performance of various components.
| Identifier | ExFiles\Box 132\4\ scan0071 | |
| Date | 27th May 1937 guessed | |
| 2. in ratio 4:1 Leylands Austenitic liners in conjunction with hardened tempered rings gives best all-round performance, taking into account the corrosion effect. # Briefly our new results are as follows ① Increased ring pressure increases bore wear. ② Solid skirt pistons. Taking average of customer's cars bore wear has increased since using Aerolite Pistons ③ Since adding the extra oil hole in conn. rod we have not reduced bore wear ④ Where ever the engine is driven hard such as on test bed or on 15,000 miles test bore wear is low ⑤ When change over was made from high depression carburetter with crankcase breather connected to intake to low depression carburetter of R.R. S.O. | ||