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).
Particulars for five new semi-floating axles, model PD.312, including ratios, track widths, and brake types.
| Identifier | ExFiles\Box 111\4\ scan0100 | |
| Date | 9th March 1939 | |
| 802 403m 1013- To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} c. By/CRL.{C. R. Lisson} Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}4/MH.{M. Huckerby}9.3.39. NEW SEMI-FLOATING AXLE PD.312. WSC.{W. S. Cassel} has asked for particulars of ratios and tracks for the axles to be built. They should be five in all and as follows:- 14.B.V. 11/41 40 mm half shafts, alum brakes, 58.0" track. 3.B.50. 10/41 " " " iron brakes 59.5 " 9.B.V. or 10.B.V. 10/43 " " " " 58 " 11.B.V. 11/41 " " " " 59" " 12.B.V. 10/43 " " " " " Probably all these axles will have to start with 58.0" track and some be modified later. The object of the wider track is to make the axles of B.V. and B.50 identical. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||