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 requirements and proposed schemes for dipping headlights on 20 HP and 40/50 models.
| Identifier | ExFiles\Box 61a\1\ scan0316 | |
| Date | 3rd March 1928 | |
| X.4555 BJ. DA.{Bernard Day - Chassis Design} HS.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} c. to Wor.{Arthur Wormald - General Works Manager} BY.{R.W. Bailey - Chief Engineer} PN.{Mr Northey} CWB. C. E.{Mr Elliott - Chief Engineer} SG.{Arthur F. Sidgreaves - MD} R1/M3.3.28. 20 HP. and 40/50. DIPPING HEAD LIGHTS. I have written to some length re. the above, but have not got very far. I now understand the situation is as follows : It is decided that RR. want (1) dipping lamps and as (2) their own std. fitting, because those available are not sufficiently easy and convenient to operate. The Sales have come to the definite conclusion by trial of each that they must also turn toward the near curb - i.e. to the left in England. This we can do many ways, but it can never be so simple as dipping only; however if it must be done the complication is justifiable. I would like to point out that Barker's arrgt. involves difficult changing to spare parts (i.e. it is not a quick and easy change) to turn right for continental work (EV.{Ivan Evernden - coachwork} contradict this if I am mistaken). Mr. Day sent me one or two suggestions, but I fear they would not look nice - i.e. lopsided, unbalanced. The scheme I have thought out has vertical pivots, also the combined movements seem sound and really simpler than we would imagine. I will send further particulars. The mechanical motion should be free from friction as possible. R.{Sir Henry Royce} | ||