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).
Internal order memo for front and rear 40/50 model road springs with specifications.
| Identifier | ExFiles\Box 17\1\ Scan004 | |
| Date | 23th January 1931 | |
| To. Order Office. X7410. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/KT.23.1.31. 40/50. ROAD SPRINGS. X.7410. X.4429. Will you please order for us two pairs of 40/50. front road springs. Free Camber 4.5" Pos. Loaded Camber Flat. Poundage of Flat Camber 1100 & 1125. Will you also please order two pairs of rear road springs. Free Camber 10.25" Pos. Loaded Camber Flat. Poundage 1350, [REDACTED] at Flat camber. Groved for lubrication. These springs should be to the same design as those supplied to our Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}3/MJ.29.11.30. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||