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).
Specifying the requirements for rebuilding a Ph.III gearbox, No. 4-HS, taken from car 31-EX.
| Identifier | ExFiles\Box 94\1\ scan0291 | |
| Date | 7th January 1936 | |
| To RHC.{R. H. Coverley - Production Engineer} X 378 Hs{Lord Ernest Hives - Chair}/Smth.15/EW.7.1.36. Ph.III Gearbox. Will you please rebuild box No. 4-HS{Lord Ernest Hives - Chair}, which has been taken out of 31-EX, to the following specification. (1) New 3rd, 4th and 2nd speed sliding pieces with small clearance. We are anxious to have new pieces rather than copper plate the old ones. (2) 8° angle cones for all gears. (3) Stiffen up inner cones as on N.Sch.4661. Also stiffen up outer cones by making them 50% thicker all over. (4) Inner piece to have fine thread surface and straight slots a la{L. A. Archer} Buick. (5) Outer cone to be rough diamond bored. (6) Oil scoop to N.Sch.4708. No drawings exist of the cones, which we shall be glad if you will detail. Hs{Lord Ernest Hives - Chair}/Smth. | ||