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).
Comparison of screw and hydraulic jacking systems for a Bentley vehicle.
| Identifier | ExFiles\Box 139\1\ scan0367 | |
| Date | 11th March 1937 | |
| 1166. W/S. Sg.{Arthur F. Sidgreaves - MD} [crossed out] c.c. He. Hy.{Tom Haldenby - Plant Engineer} Rm.{William Robotham - Chief Engineer} Da.{Bernard Day - Chassis Design} [crossed out] E/Lid.{A. J. Lidsey}10/HP.11.3.37. re Bentley Jacking. In reply to Sg.{Arthur F. Sidgreaves - MD}2/E.11.3.37, the scheme is similar to that which is standard on the Jaguar, but instead of using a screw jack the Sessions scheme utilises a hydraulic jack. The operation of the hydraulic jack is easier and quicker than the screw jack, and is in our opinion a more attractive proposition. The portable jack unit with its handle, as on the Jaguar, weighs 9½ lbs, and the Sessions hydraulic unit weighs 7½ lbs. With either system modifications to the chassis are necessary to make a satisfactory job, and these modifications would be almost identical for either jack. We will arrange to have a jack of each variety available for your inspection on Monday next. E/Lid.{A. J. Lidsey} | ||