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 carried out on a lightened 20 HP clutch, detailing weight reduction and performance.
| Identifier | ExFiles\Box 5\6\ 06-page033 | |
| Date | 14th April 1928 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} c. to EY. CY. X. 5300 Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}2/LG14.4.28 20 HP. LIGHTER CLUTCH. We have carried out tests on a lighter 20 HP. clutch. The weight of the std. clutch is 69.625 lbs. The weight of the lightened clutch is 41.000 lbs. Attached is a print G.51212 shewing where the weight has been removed. We should have preferred to take less from the periphery but made the test as simple as possible. We have not been able to detect any loss of performance in slow running or appreciable greater difficulty in getting away from a stand-still due to this modification which saves 28.6 lbs. weight. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||