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).
Appendix with performance calculations for a Standard Saloon and model R-35-AE.
| Identifier | ExFiles\Box 90a\2\ Scan189 | |
| Date | 22th August 1934 | |
| Ev.{Ivan Evernden - coachwork}1/KW, 22.8.34. APPENDIX, Standard Saloon. Test 1. Road wheel Horse Power = 92.5 at 4150 R.P.M. & 86 M.P.H. Axle Ratio 4.1 to 1; Projected Area = 23.4 sq. ft. Const. T.R. at 30 lbs/ton = 51 lbs. (wt. 1.7 tons two up) H.P. due to Const. T.R. at 86 M.P.H. = (51 x 86) / 375 = 11.6 H.P. Tractive Resistance due to windage = (80.9 x 375) / 86 = 353 lbs. ∴ drag at 100 M.P.H. = (35.3 x 100²) / 86² = 477 lbs. K = 35.3 / (23.4 x 86²) = .00204. R-35-AE. Test 4. Road Wheel Horse Power = 118.5 at 4300 R.P.M. = 99.5 M.P.H. Axle Ratio 3.73 to 1; Projected Area 15.0 sq.ft. Const. T.R. at 30 lbs/ton, wgt. = 1.4 tons (two up). Const. T.R. = 30 x 1.4 = 42 lbs. H.P. due to Const. T.R. = (42 x 99.5) / 375 = 11.2 H.P. T.R. due to windage = (107.3 x 375) / 99.5 = 404 lbs. at 99.5 M.P.H. = 406 lbs. at 100 M.P.H. K = 404 / (15.0 x 99.5²) = .00272. | ||