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).
Graph showing the effect of tyre deflation on tractive resistance at various speeds using well-worn Canadian Dunlop Cord tyres.
| Identifier | WestWitteringFiles\K\June1923\ Scan39 | |
| Date | 1st July 1923 | |
| TESTS TAKEN ON 3 EX. CANADIAN DUNLOP CORD USED WELL WORN. T.R LBS. PER TON M.P.H TYRES 30 LBS [] TYRES 30 LBS [] EFFECT OF TYRE DEFLATION ON TRACTIVE RESISTANCE. SOFT TYRES INCREASE TRACTIVE RESISTANCE BY 14.0 LBS PER TON. ROLLS-ROYCE, LIMITED PRINT ROOM. 1 JUL 23 DERBY | ||