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).
Instructions on material changes for bushes and thrust washers in the Bentley 111 universal gearbox.
| Identifier | ExFiles\Box 99\4\ scan0142 | |
| Date | 22th January 1938 | |
| B1/NO. [stamped and crossed out] C.S. [stamped and crossed out] c. Rm.{William Robotham - Chief Engineer} [stamped] 200B [handwritten] DA.{Bernard Day - Chassis Design}4/G.22.1.38. [Illegible signature] 428 [handwritten] FTH [handwritten] [Illegible handwritten note] BENTLEY 111. UNIVERSAL GEAR BOX. In assembling the universal gear box on the first Bentley 111 car, it is not desired to use the steel bushes and thrust washers now instructed for the 3rd and 2nd speed gears, but to replace them by [text 'chilled cast bronze' is struck through]. [Initials 'AH' handwritten to the right] In the case of the third speed, this can be done by substituting bronze for steel in the existing details. The adjusting washer at the rear of the third speed gear would not be suitable for production in bronze, but should be possible [text 'for one box' is struck through]. In the second speed pinion, the direction of the thrust makes the change from steel to bronze not desirable for the thrust washers and the steel washers should be retained with a bronze washer .075 thick, added by reducing the length of the pinion boss a corresponding amount. The bush will, of course, be bronze, and in both this case and the third speed bush, [text 'should have the internal annulus and extra holes for lubrication introduced on the Wraith.' is struck through]. DA.{Bernard Day - Chassis Design} | ||