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).
Depot sheet detailing recommended tyre pressures for the 20 HP model.
| Identifier | ExFiles\Box 39\2\ Scan199 | |
| Date | 1st November 1928 | |
| To Hm.{Capt. W. Hallam - Head Repairs} from Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} c. to Mx.{John H Maddocks - Chief Proving Officer} X3538 Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}4/LG20:11.28. DEPOT SHEET. 20 HP. TYRE PRESSURES. We recommend that the pressures for the 31 X 5¼" tyres should be :- FRONT 35 lbs/sq.in. REAR 35 lbs/sq.in. The rear may be run at 5 lbs/sq.in. lower for town work. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||