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).
Comparing the current consumption of Lucas headlamps with Stephen Grebel or Marchel lamps.
| Identifier | ExFiles\Box 61a\2\ scan0102 | |
| Date | 23th September 1930 | |
| x7800 To Sg.{Arthur F. Sidgreaves - MD} from Hs.{Lord Ernest Hives - Chair} Hsl/AD23.9.30. RE- HEADLAMPS. We consider that in comparing the Lucas with the Stephen Grebel or Marchel lamps it is essential to know whether they both are using the same amount of current. Owing to our dynamo not giving sufficient output we have had to keep the amount of current used by the head lamps down to the minimum. I have an idea we shall find the lamps which Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork} is comparing with the Lucas are using considerably more current. We will go further into this matter and let you know. Hs.{Lord Ernest Hives - Chair} | ||