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).
98-NK car engine's connecting rod bearings after 10,000 miles of testing in France.
| Identifier | ExFiles\Box 69\3\ scan0176 | |
| Date | 8th April 1925 | |
| R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. BH. c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} Expl. No. 78770 REF: Hs{Lord Ernest Hives - Chair}4/LG1 8.4.25 S E C R E T. EAC. 'V' SERIES - TESTS IN FRANCE. Y8940 X1030 Attached herewith is a report on the engine out of 98-NK car which ran 10,000 miles in France. The worst part on the engine was the condition of the connecting rod bearings. We have an engine on the test bed which has run 1000 hrs. It has run at 2750 and 2500 revs. for considerable periods - the connecting rods on there gave no trouble. We use an oil cooler on the test bed and run with oil entering the bearings at 60°C to 70°C. It is possible that owing to the heavy oil consumption of the car in France that it was frequently run with a small quantity of oil circulating which would tend to get very hot. Hs.{Lord Ernest Hives - Chair} | ||