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).
Design and stiffness of S.S. Headlamp Brackets and related stays.
| Identifier | ExFiles\Box 61a\2\ scan0032 | |
| Date | 18th February 1929 | |
| SECRET: X7800 BY.{R.W. Bailey - Chief Engineer} HS.{Lord Ernest Hives - Chair} } FROM DA.{Bernard Day - Chassis Design} DAI /M18.2.29 C. to SG.{Arthur F. Sidgreaves - MD} S.S. HEADLAMP BRACKETS With reference to item 6. on HS{Lord Ernest Hives - Chair}/RM{William Robotham - Chief Engineer}6/LG 31.1.29., we conclude that the principle flexibility is in the tubes which are now rather tall and may be too slender. We therefore suggest on N. sch. 2833. herewith that they should be increased in diameter from 1.250 to 1.625, the resulting increase of stiffness being rather more than two and a half times. We also suggest that the forging at the bottom should be slightly modified to improve its appearance. We have seen a photograph of the stays to the wings which we believe you are fitting to most of the cars, and the principle objection we see in them is that they are not practical from a coachbuilding point of view. We do not like the idea of a stay between the two lamps. We have been trying to avoid lines crossing the radiator. We presume from the fact that these stays are efficacious that the flexibility of the frame is not the principle trouble. DA.{Bernard Day - Chassis Design} | ||