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).
Testing ball bearings in place of roller bearings on the epicyclic gear for Eagle and Condor engines.
| Identifier | ExFiles\Box 38\6\ Scan073 | |
| Date | 22th October 1918 | |
| R.R. 235 a (200 T) (S.E. 527. 21-2-18) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2129 To R.{Sir Henry Royce} from EH. c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to BY.{R.W. Bailey - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} EH4/LG221018. ------------- X. 3383 - BALL BEARING IN PLACE OF ROLLER BEARINGS ON EPICYCLIC GEAR. Theball bearings on the "Eagle" have now completed 30 hours running. They are still in very good condition. The ball bearings on the "Condor" have completed 9 hours. We have fitted up another "Eagle" engine with 2 ball bearings and 1 roller bearing so that we can get a direct comparison under the same conditions of running. EH. | ||