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).
Page from a report detailing test conclusions on piston ring gumming tendency and oil passage.
| Identifier | ExFiles\Box 66\1\ scan0123 | |
| Date | 22th November 1926 guessed | |
| contd :- -2- hard carbon found in the previous test. Therefore we may say that from these tests :- (1) The gumming tendency is less with rings having large groove clearance than those having small clearance. (2) The gumming tendency is more marked with weak than with stiff rings. We are further pursuing these experiments with the object of determining the influence on the problem of oil passage past the rings and the stiffness. Hs{Lord Ernest Hives - Chair}/A.{Mr Adams} C. Lovesey. | ||