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).
The modifications required for B.V. Gearboxes.
| Identifier | ExFiles\Box 99\4\ scan0216 | |
| Date | 8th June 1939 | |
| H28 To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} c. HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth} c. By/CRL.{C. R. Lisson} Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}5/MH.{M. Huckerby}8.6.39 B.V. GEARBOXES. The object of this memo is to make clearer the modifications required to the experimental gearboxes. Three existing overdrive boxes. (1) Strengthened top and overdrive cones GB.5131/3 (2) Altered 2nd. speed cam angle PD.452. Three standard ratios boxes being built. (1) Strengthened top and third speed cones. (2) Altered 2nd. speed and cam angle. (3) Side shaft roller bearing with steel cage. Six new standard ratio boxes for new cars. (1) Strengthened top and third speedcones. (2) Altered 2nd. speed cam angle and dog chamfer angle. (3) Side shaft roller bearing with steel cage. (4) PD.450 servo oil seal. (5) Latest alum bronze forks. (6) Selector forks with wider jaws. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||