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).
List of non-standardised parts and modifications with associated notes.
| Identifier | ExFiles\Box 154a\3\ scan0290 | |
| Date | 12th June 1937 guessed | |
| J.B.14. -4- Parts not standardised, data obtained (continued) Ref. Description. Notes. NS.{Norman Scott}4900 Modification to change speed lever. Not standardised on account of trouble with same scheme on B.27.AE. Rm.{William Robotham - Chief Engineer}301 Modification for lubrication of Propeller shaft sliding joint with oil instead of grease. Experience only required. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} Larger studs holding pinion housing in axle. Not now considered necessary in Service. Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems} Deletion of petrol pump fuses. Experience required. Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems} Special black sheet stoneguard for petrol tank. Experience required for subsequent use with lightened tank. Rm{William Robotham - Chief Engineer}/Wst. A.C.revolution counter. Further mileage required. Will be fitted to next 15,000 miles Bentley. Rm{William Robotham - Chief Engineer}/Wst. Petrol pump switch. Discarded in favour of other switch now standardised. Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} New type Lucas windscreen wiper. Further mileage required. Rm{William Robotham - Chief Engineer}/Std. Thermostatic control of water flow and fixed radiator shutters. Further experience required and development in progress. Rm{William Robotham - Chief Engineer}/Std. Various special fans. Experience required. | ||