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 performance and criticism of hydraulic jacks on chassis GZU-24.
| Identifier | ExFiles\Box 139\2\ scan0187 | |
| Date | 16th January 1935 | |
| x3117 -> S/W....Hs.{Lord Ernest Hives - Chair} c. to Sg.{Arthur F. Sidgreaves - MD} c. to Wor.{Arthur Wormald - General Works Manager} [Handwritten: R Bouverie See me Ru] C10/C16.1.35 HYDRAULIC JACKS ON CHASSIS No. GZU-24. -------- These jacks have been used regularly during the past month or so. Practically every day they are put into use, all four at one time, and for many hours on end, including on four or five occasions 24 and 36 hours; and on no occasion has there been any sign of the jacks receding. We have also had them tried on a bad cambered road, on a hill and on a bad pot-holey road, quite successfully. The only criticism, which is undoubtedly a very important one, is that one can only use the 2 front jacks together and the 2 back jacks together, so that when one lifts up the back one has no brakes. It would certainly appear that the 2 rear jacks ought to work independently so that there is at least one wheel on the ground which can be braked. Otherwise they appear to be quite satisfactory; over this comparatively short period of time, of course. C. | ||