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).
Improving headlamp light spread by addressing blind zones and proposing experimental bulbs with extended filaments.
| Identifier | ExFiles\Box 167\1\ img200 | |
| Date | 28th October 1937 | |
| -2- Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux}13/MH.{M. Huckerby}28.10.37. We should, however, like more spread of light as there is a noticeable blind zone on either side of the main driving beam, which is particularly noticeable on curves. At these times the road one is making for is more or less in the dark. It therefore seems that if Lucas can be prevailed upon to further improve the lamp it will have to be by producing special bulbs for experimental purposes with extended filaments to give the desired effect, which if satisfactory, would perhaps be standardised. In conclusion we would state that although we ask for this improvement, the lamps as they stand are superior to the P.100 type fitted at present. Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} | ||