Dipping angle of headlights for the 20 HP and Goshawk models, referencing the 40/50 HP.
| Identifier | ExFiles\Box 61a\1\ scan0204 | |
| Date | 2nd February 1924 | |
| X.4555 To Hs. {Lord Ernest Hives - Chair} from DA {Bernard Day - Chassis Design} /EV. {Ivan Evernden - coachwork} c. to BY. {R.W. Bailey - Chief Engineer} DA {Bernard Day - Chassis Design} /EV {Ivan Evernden - coachwork} 1/M16. 2. 24. DIPPING HEAD LIGHTS. 20 HP. X.4555. Sales inform us that on the 40/50 HP. Messrs. Barkers make the large lamps used on these cars dip to the extent that the top of the outermost rim of the lamp moves forward from the vertical a distance of 2 1/4". From this it will be possible to ascertain the angle of dip, and we think a similar angle should be applied to Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)). DA. {Bernard Day - Chassis Design} | ||
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).