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).
Camshaft tests for a 20 HP engine, detailing results from both test bench and road tests.
| Identifier | ExFiles\Box 74\4\ scan0180 | |
| Date | 3rd October 1923 | |
| R.R. 493A (40 H) (SL 42 12-7-23). J.H., D.{John DeLooze - Company Secretary} EXPERIMENTAL REPORT. 4134 Expl. No. 4229 REF: Hs{Lord Ernest Hives - Chair}4/LG3.10.23. CAMSHAFT TESTS ON 20 HP. The modified camshafts were put in hand as a result of tests carried out on G.1. engine which has two separate camshafts so that the angle between the camshafts could be set to any degree. Curves herewith show difference in power obtained on the Test Bench. Road tests. Comparative tests on the road show the improvement in performance one would expect from the power curves. Tests taken on our standard test hill proved that we reduced the time for the climb from 2 mins. to 1 min. 50 secs. - the minimum speed on the hill was increased from 16 m.p.h. to 18 m.p.h. Tests on the level showed no differenve in per-formance. We can obtain maximum power with the 110° camshaft without engine roaring. A.J.L. | ||