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).
Various parts that were run but not standardised, providing data for future use.
| Identifier | ExFiles\Box 82\5\ scan0172 | |
| Date | 12th June 1937 guessed | |
| -3- 3.B.1V. The following parts were run but not standardised, and have provided data for future use:- Ref. | Description. | Notes. 25/30. type. | Oil filler with crank-case breather and deletion of rocker cover breather. | Satisfactory results with mock-up scheme. Design scheme to be run on next 15,000 miles Bentley with view to Standardisation. EB.175 | Valve springs produced in American low carbon wire in U.S.A. | Samples for trial and comparison. No trouble. EB.2700 | Extra hole in each crank-pin opposite existing. | Not standardised on account of high oil consumption. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} | Spun filled tail pipe on exhaust system. | Further mileage required on next 15,000 miles test Bentley. Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} | Armstrong rear shock dampers. | Initial experience only. Not intended for Standardisation. Improved Armstrong dampers will be fitted to next 15,000 miles test Bentley. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | Ferodo S.5805 or F.Z. for brake liners. | As used on Ph.III. Not suitable for Bentleys on account of greater heat. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | Chromidium brake drums. | Not to be standardised until 32-EX. has completed 15,000 miles as first time used. Very important to standardise soon as Hilenite as risen 3/- per cwt. to 47/--. RM{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | Anti-judder weights in front brakes. | Already in Production but require improved pins and bushes. continued | ||