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).
Tests on piston ring groove clearance and stiffness to prevent 'gumming up'.
| Identifier | ExFiles\Box 182\M18\ img075 | |
| Date | 20th October 1926 guessed | |
| Cont'd :- -2- Our tests indicate that there is less tendency to "gum up" with large groove clearance than with small. A probable explanation is that liberal clearance allows ... movement of the ring to prevent building up a film of ... We are now making tests to show how the gumming tendency is influenced by weak and stiff piston rings. The results should show us if an advantage could be expected from a stiffer ringe. Re/A.C.Lovesy. | ||