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).
Error in wheel and tyre weights, comparing them with internal figures and noting the goal to reduce road spring weight.
| Identifier | ExFiles\Box 16\7\ Scan274 | |
| Date | 4th June 1930 | |
| OY. From Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} T.P [crossed out] X7410 Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}S/W.4.6.30. File Under Springing [handwritten and underlined] We think that there has been some error in the wheel and tyre weight which you have been given because the weight figure for our 20" wheel and tyre comes out at 136 lbs. pair. Otherwise, we think that these figures are reasonable. We should like to point out that we hope to reduce the road spring weight as time goes on. [Handwritten note, bottom left]: Rm{William Robotham - Chief Engineer} Sidgrey's list of May 8 gives 20x7 wheel & tyre 83 lbs. 166 lbs / pair 19x7 U.S. wheel & tyre 78.75 lbs 157.5 lbs per pair. [Handwritten note, bottom right]: Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson} Rm.{William Robotham - Chief Engineer} [in red circle] Ay June 5/30. | ||