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).
The out-of-balance specification for 6' tyres on 19' rims for the 20 HP chassis.
| Identifier | ExFiles\Box 106\4\ scan0120 | |
| Date | 14th February 1930 | |
| BY.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} COPY. X5810 Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}2/MJ.14.2.30. OUT OF BALANCE OF 6" TYRES FOR 19" RIMS. 20 HP. CHASSIS. X.401. X.5820. X.5810. With reference to your By.23/N19.12.29. Please note that the Dunlop Rubber Co., are proposing to include tyres up to 67 ins. ozs. out of balance, from now onwards. We presume that this will be in order, as we note bolt G.54100 for accomodating the extra balance weights necessary was instructed to the Works 27.12.29. -- Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||