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).
Test results on piston ring 'gum up' tendency with varying groove clearances and ring stiffness.
| Identifier | Morton\M18\ img075 | |
| Date | 16th November 1926 guessed | |
| Contd :- -2- Our tests indicate that there is less tendency to 'gum up' with large groove clearance than with small. A probable explanation is that increased clearance allows more 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 stiffer rings. Re/A.O.Lovesy. | ||