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).
Letter discussing engine oscillations and clutch jaggers caused by incorrectly fitted engine suspension casings, including a diagram of the parts.
| Identifier | ExFiles\Box 146\1\ scan0137 | |
| Date | 16th December 1937 | |
| W.A.Robotham, Esq., Park Leys, DUFFIELD. Derbyshire. Bord & Beck clutches. ------------------- Dear Rm{William Robotham - Chief Engineer}, Since receiving your memo. Rm.{William Robotham - Chief Engineer}7/AP.10.12.37, I have had further occasion to investigate the clutch question, and I hasten to inform you of the results. The position is that the engine oscillations, when getting away from low speeds, and a certain amount of clutch jaggers became more apparent - in fact disagreeably so, owing to a silly mistake made on our part ! The workmen had fitted the engine back into the chassis, and had wrongly re-erected the rear engine suspension casings, inasmuch as the F.58589 top casing for the top pad had inadvertently been fitted in place of the F.55579 bottom casing. Therefore, as there is a difference in depth between the two casings, this caused the bottom casing to foul against FB.282/3 top casing for rubler pad. Since we have put this matter right, in this respect the car has performed very nicely, although there is no doubt that, in reverse, clutch jaggers are still apparent - in fact, they are fairly easy to produce. When I say this, I do not mean produce purposely - whereas, having again interviewed Pierre Louis Dreyfus, and Prince Guy de Polignac on this subject, they are both very categorical about the delightful manoeuvring capabilities of the Bentley, when fitted with the "Long" type clutch plate. Sincerely yours, h [Text from diagram] F58589 FB 282/3 F55579 | ||