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).
Weight reduction calculation for a dropped cross member between lamps.
| Identifier | ExFiles\Box 88\3\ scan0061 | |
| Date | 1st November 1934 | |
| X258 C O P Y. 1.11.34. Lightened✓ Dropped Cross Member between Lamps EX.16233 Bracket 18¾ ozs. 2 = 37½ ozs. EX.16234 Tube = 26½ " -------------------------------- 64 ozs. Originally was - FB.1366 Bracket 29¼ ozs 2 = 58½ ozs. FB.1367 Tube = 57 ozs. -------------------------------- 115½ ozs. Weight reduced by 3 lbs. 3½ ozs. or 45%. | ||