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).
Specifications for a Michelin Jack suitable for a 40/50 HP Chassis with medium pressure tyres.
| Identifier | ExFiles\Box 26\3\ Scan030 | |
| Date | 7th June 1926 | |
| To BY/HM.{Capt. W. Hallam - Head Repairs} from Hs.{Lord Ernest Hives - Chair} V391 Hs{Lord Ernest Hives - Chair}1/LG7.6.26. 40/50 HP. CHASSIS - MICHELIN JACK SUITABLE FOR MEDIUM PRESSURE TYRES. Replying to BY/HM{Capt. W. Hallam - Head Repairs}17/G3. 6.26. To fit the Jack under the front axle, wxxx the minimum height must be 7" and the minimum lift 5". To fit the Jack under the front springs, the minimum height must be 10.25" and the minimum lift 5". To fit the Jack under the rear axle, the minimum height must be 10.60" and the minimum lift 5". Hs.{Lord Ernest Hives - Chair} | ||