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).
Performance analysis appendix with calculations and tabulated data for different axle and overdrive settings.
| Identifier | ExFiles\Box 97\3\ scan0066 | |
| Date | 8th March 1939 guessed | |
| -2- APPENDIX. (1) The Embericos Car - K = .00121 Cx{Major Len W. Cox - Advertising Manager} = .473 Assume same values for Corniche. (2) Axle Ratio 3.41 to 1 overdrive 1.2 to 1. Road Racing Tyres at 48 lbs.sq.in. pressure and 720 revs per mile. Size 16 x 6.50. (3) Projected area = 24 sq.ft. Wgt. Total assume 34¾ cwts with driver = 3892 = 1.74 tons. Front 1845 lbs. Rear 2047 " 12 x 41 axle and overdrive. M.P.H. | H.P. | Available Tractive Force. | Windage Resistance in lbs. | Tyre Resist: in lbs. per ton. | Rolling Resist: in lbs. | Total Tr.{Capt. F. W. Turner - Finance} in lbs. 80 | 101.5 | 475 | 186 | 27.5 | 47.8 | 233.8 90 | 110.25 | 460 | 236 | 34.0 | 58.0 | 294.0 100 | 114.00 | 427 | 291 | 40.0 | 69.5 | 360.5 110 | 111.5 | 380 | 350 | 49.0 | 85.0 | 435.0 11 x 41 axle and overdrive 80 | 108.50 | 510 | 186 | 27.5 | 47.8 | 233.8 90 | 113.75 | 474 | 235 | 34.5 | 58.0 | 294.0 100 | 112.25 | 421 | 291 | 40.0 | 69.5 | 360.5 105 | 108.00 | 386 | 321 | 43.25 | 75.5 | 396.5 110 | 100.00 | 340 | 350 | 49.0 | 85.0 | 435.0 | ||