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 with longer connecting rods to address over-run vibrations in an EAC engine.
| Identifier | ExFiles\Box 72\1\ scan0154 | |
| Date | 1st May 1924 | |
| R.R. 493A (20H) (D.A. 652 20-3-24) J.B.D. Y9030 Expl. No. 9550 9030 REF: Hs{Lord Ernest Hives - Chair}2/LGS.5.24. EXPERIMENTAL REPORT. S E C R E T. To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. RG.{Mr Rowledge} c. to DA.{Bernard Day - Chassis Design} E.{Mr Elliott - Chief Engineer} c. to BY.{R.W. Bailey - Chief Engineer} WOR.{Arthur Wormald - General Works Manager} EAC. ENGINE - OVER-RUN VIBRATIONS. We have carried out tests with longer connecting rods (Hawk engine type) fitted to the above engine. The rods were changed over twice & in order to confirm the results. The longer rods do make the engine appreciably smoother on retard, but there was still left a slight period of much reduced amplitude at the same speed. We are preparing to test the longer rods in conjunction with the stiffer engine coupling shaft on a second EAC. engine which is rather a worse example for over-run vibrations. Hs.{Lord Ernest Hives - Chair} | ||