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).
Technical particulars and specifications for the Minx Gearbox, detailing teeth counts and dimensions.
| Identifier | ExFiles\Box 136\2\ scan0220 | |
| Date | 8th March 1940 | |
| 1153 + 110H To Ev.{Ivan Evernden - coachwork} from Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}3/MH.{M. Huckerby}8.3.40. GEARBOX. Herewith particulars of the Minx Gearbox as promised to you yesterday. Nos. of teeth. 1st. M.{Mr Moon / Mr Moore} shaft 21 2nd. M.{Mr Moon / Mr Moore} shaft C.M. 29 3rd. 25 2nd. 19 1st. 12 3rd. M.{Mr Moon / Mr Moore} shaft 3rd. 27 2nd. 34 1st. 31 Reverse driven 20 " driver 15 1st. Speed teeth. Wheel O.D. 4.1375 Root. D.{John DeLooze - Company Secretary} 3.531 Root Rad. 0.045 No. teeth 31 Width 0.450 Centres 2.750 Depth below top Chordal of tooth. thickness. 0 0.080 0.050 0.132 0.125 0.1875 0.175 0.216 0.250 0.239 Pinion. O.D. 1.8875 R.D. 1.286 R.R. 0.050 No. Teeth 12 Width 0.450 Centres 2.750 Continued | ||