Performance calculations for a B.23.AE Streamline Saloon (Park Ward), comparing lap speed data with wind tunnel results.
| Identifier | ExFiles\Box 161\1\ scan0051 | |
| Date | 10th November 1937 guessed | |
| -3- Appendix. B.23.AE - StreamlineExperimental Streamline Bentley B.23.A.E Saloon (Park Ward). Car lapped Brooklands at 95 M.P.H. and did flying half mile at 100 M.P.H. and maximum road speed 105 M.P.H. Axle ratio 3.73 to 1. H.P. at road wheels 92.5 H.P. To Derive K. {Mr Kilner} from the Lap Speed. Constant t.r. 30 lbs/ton - weight, two up, 1.7 tons h.p. due to const: t.r. = (51 x 95) / 375 = 12.9 h.p. h.p. for windage = 92.5 - 12.9 = 79.6 t.r. due to windage = (79.6 x 375) / 95 = 314 lbs. Projected area = 19.025 sq.ft. R. {Sir Henry Royce} = KAV² K. {Mr Kilner} = 314 / (19.025 x 95²) = .001825 From Wind Tunnel Tests. Drag = 305 lbs at 100 M.P.H. K (wind tunnel) = 305 / (19.025 x 100²) = .001603 Tunnel K / Real K. {Mr Kilner} = 1603 / 1825 = .88 Cont'd. {John DeLooze - Company Secretary} | ||
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).