Comparison of inertia values in lbs.ins. for various flywheel and clutch configurations.
| Identifier | ExFiles\Box 8\1\ 01-page56 | |
| Date | 22th April 1938 | |
| 612 also 111Q COPY FOR FILES. c. to Rm {William Robotham - Chief Engineer} /Hym. Rm {William Robotham - Chief Engineer} /WRC.8/JH.22.4.38. FLYWHEEL INERTIA lbs.ins. High Inertia flexible wheel as first fitted to 29.U.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 --- 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 Rm. {William Robotham - Chief Engineer} 504 - 100. --- 1243 Plus 10" clutch. 250. --- 1493. Comparison of inertia. Relative inertia. Standard Wraith wheel GW.1319. = 1580. + 11" clutch. 445 --- 2025. 1 Flexible wheel Rm. {William Robotham - Chief Engineer} 498 heavy. 1950. + 11" clutch 445 --- 2395 1.18 Flexible wheel Rm. {William Robotham - Chief Engineer} 498 light. 1243 + 10" clutch. 250 --- 1493 .74 Oldsmobile flywheel approx. 900 + 9" clutch. 200 --- 1100 .54 Rm {William Robotham - Chief Engineer} /WRC. | ||
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).