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).
Suggestions from Mr. Royce regarding the design and material of connecting rod and main bearing liners.
| Identifier | WestWitteringFiles\B\January1918\ Scan18 | |
| Date | 28th January 1918 | |
| To F.H. from E.{Mr Elliott - Chief Engineer} c. to EFC. c. to Oy. ORIGINAL Re - Some Recent Suggestions from Derby RECEIVED D 31 JAN 1918 X1906 X.3250 LINERS FOR CONNECTING ROD MADE OF MILD STEEL. We do not think it safe to use mild steel for these liners because of the small area of steel on the bearing side of the bolt, which might give way in compression locally, owing to low elastic limits. Mr. Royce thinks that the present liner in alloy steel could be advantageously altered in design as shown in the sketch. The dovetailed grooves should be replaced by the round keys which seem more easy to make and the distribution of the round keys should be as shown. SHORT NECK BREAKING INTO CIRCLE [Sketch of a liner with four circular keys] Y.3249. MAIN BEARING LINERS IN MILD STEEL. The suggestion to use mild steel for the main bearing liners is quite good and Mr. Royce approves of the change. The design of the liner should, however, be altered as shown in the sketch. Four round keys are used for retaining the white metal and two lightening holes are introduced, one on each side of the bolt hole. [Sketch of a liner with four circular keys and two lightening holes] | ||