Comparison of flywheel inertia values in lbs.ins. for various wheel and clutch combinations.
| Identifier | ExFiles\Box 129\4\ scan0204 | |
| Date | 22th April 1938 | |
| 1110 also 612 COPY FOR FILES. c to Rm {William Robotham - Chief Engineer} /Wym. {G. Harold Whyman - Experimental Manager} Rm {William Robotham - Chief Engineer} /NRC. {N. R. Chandler} 8/JH.22.4.38. FLYWHEEL INERTIA lbs.ins. High Inertia flexible wheel as first fitted to 29.G.VI. Flywheel Rm. {William Robotham - Chief Engineer} 499 = 948 Ring Rm. {William Robotham - Chief Engineer} 500 = 902 Flexible drive.Rm. {William Robotham - Chief Engineer} 504 = 100 Total = 1950. Plus 11" clutch. 445 Total. 2395. Low inertia flexible wheel as instructed 20.4.38. Flywheel Rm. {William Robotham - Chief Engineer} 499 = 948. Rim. Rm. {William Robotham - Chief Engineer} 502 = 195. Flexible drive " 504 = 100. Total = 1243 Plus 10" clutch. 250. Total = 1493. Comparison of inertia. Relative inertia. Standard Wraith wheel GW.1319. = 1580. + 11" clutch. 445 Total = 2025. 1 Flexible wheel Rm. {William Robotham - Chief Engineer} 498 heavy. + 11" clutch 1950. 445 Total = 2395 1.18 Flexible wheel Rm. {William Robotham - Chief Engineer} 498 light. + 10" clutch. 1243 250. Total = 1493 .74 Oldsmobile flywheel approx. + 9" clutch. 900 200 Total = 1100 .54 Rm {William Robotham - Chief Engineer} /NRC. {N. R. Chandler} | ||
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).