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 test results for Bentley Chassis 2.B.IV at Brooklands track, including speed, acceleration, and notes on wing design and an oil leak.
| Identifier | ExFiles\Box 155\1\ scan0086 | |
| Date | 18th May 1933 | |
| x/788. To Sg.{Arthur F. Sidgreaves - MD} from Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} c. to Wor.{Arthur Wormald - General Works Manager} c. to E.{Mr Elliott - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to By.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}5/KT.18.5.33. CHASSIS 2.B.IV. ON BROOKLANDS TRACK. The second Bentley car was taken to Brooklands for various comparative tests. The following speeds were recorded. Lap Speeds. (a) Complete car - 85.13 m.p.h. (b) Complete car except for front wings - 89.09 m.p.h. Flying Half Mile Speeds. (a) Complete car - 85.71 m.p.h. (b) Complete car except for front wings - 90.91 m.p.h. N.B. The above figures are the average of three readings in each case. The front wings absorb 3.86 m.p.h. (taken on a lap speed basis), this is approximately the same as the domed type wings on the first Bentley car. We were hoping that the flared wings would be better. The flared wings as fitted to this car are unnecessarily large and high and we hope to improve them on the next car by lowering them and reducing them in size slightly. The following acceleration figures were obtained :- M.P.H. Time. 10 - 30 - 8.7 secs. 10 - 50 - 17.4 secs. Car Weight 10 - 60 - 24.4 secs. 10 - 70 - 33.3 secs. 30 cwt. 3 qrs. 14 lbs. 60 - 75 - 15.2 secs. The major trouble experienced on the track was loss of engine oil through the rear bearing into the clutch pit. This is very bad, and is not improved by | ||