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).
Improving low-speed engine power by reducing the camshaft angle from 118° to 110°.
| Identifier | WestWitteringFiles\K\October1923\ Scan22 | |
| Date | 1st October 1923 | |
| R.R. 403 (40 H) (SL 42 12-7-23). J.H., D.{John DeLooze - Company Secretary} ORIGINAL EXPERIMENTAL REPORT. COPIES TO: R.C., BJ, WOR{Arthur Wormald - General Works Manager}, By, (E, Da{Bernard Day - Chassis Design}, EP{G. Eric Platford - Chief Quality Engineer}), (EH, OY) Expl. No. Y4134 4229 REF H54/LGS.10.23. OBJECT OF TEST. To improve power at low speeds and reduce tendency for engine to roar. TESTER. A.J.Lidsey. CONDITIONS. Comparative tests taken on 3-G-11 engine on the Test Bench. Comparative tests on the road on 3-G-11 and 4-G-11. SUMMARY OF TEST. The results of our tests show the camshaft with the angle between the cams reduced from 118° to 110° gives us increased power with no apparent disadvantage. Other experiments are in hand with different lengths of cam. We suggest we might take advantage of the improvement obtained with the 110° Camshaft as it is a very easy alteration to make when producing the Camshafts. Hs.{Lord Ernest Hives - Chair} | ||