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 testing and examination of a hydraulic shock damper for a Phantom III chassis.
| Identifier | ExFiles\Box 96\1\ scan0269 | |
| Date | 1st February 1938 | |
| RES 1292 BY.....From RHC{R. H. Coverley - Production Engineer}/Cy. c. Rm{William Robotham - Chief Engineer} c. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} c. Mx.{John H Maddocks - Chief Proving Officer} c. LA.{L. A. Archer} RHC{R. H. Coverley - Production Engineer}/Cy.2/FH.1.2.38. PHANTOM III. RE. HYDRAULIC SHOCK DAMPER - Ex. CHASSIS 3-AZ-108. This Damper returned from Cricklewood was handed over to LA.{L. A. Archer} exactly as received and fitted to a test chassis. After testing out under all road conditions for over one hundred miles, not the slightest trace of knock could be heard. The Damper was then fitted to a bodied car and again tested by the Repair Department for approximately a further one hundred miles with the same result, no trace of knock. A strip examination of the Damper was then made and this revealed the casing to be only half full of oil, just covering the piston. On checking the sizes of the Bushes and Lever diameters the following results were obtained. Actual. Drg. Sizes. Lever small diameter. .999 .9995-¼ Bush " " .9995-1.000 1.000+½ Lever large diameter. 1.374 1.3745-¼ Bush " " 1.3745 1.375+½ It will thus be seen that there is .0005 clearance between shaft and bush diameters. Actually, no slack can be felt owing to very slight inalignment of the bores. -cont'd- | ||