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).
Comparative horsepower and aerodynamics of E.R. Hall's car, authorising wind tunnel tests.
| Identifier | ExFiles\Box 90a\2\ Scan131 | |
| Date | 17th July 1934 | |
| x7962 To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} from Sg.{Arthur F. Sidgreaves - MD} E.R.Hall's Car - Sg{Arthur F. Sidgreaves - MD}15/E17.7.34 Copy to Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} Bn.{W.O. Bentley / Mr Barrington} Ev.{Ivan Evernden - coachwork} B-35-AE. Referring to Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}6/KW.11.7.34, the information given is of great interest. You say that the engine of Mr.Hall's car is on the low side and does not come outside the variations you would expect on production but, as you are comparing the results obtained with this car on the track with the results obtained from B.23.AE, i.e. the so-called 100 mile an hour car, it is important to know how the HP of Hall's engine compared with the HP of that engine and, as I am pretty sure that this engine was tuned up well before it went to Brooklands for its tests, I should imagine that you have a record of its HP. Without the comparative HP of the two engines it is quite impossible to judge whether the difference in speeds has much to do with bodies or not. If the HP of Hall's engine were the same or practically the same as that of B.23.AE, then it certainly is very interesting to note that a cut-down light open body of this description is worse from an aerodynamic point of view than the special body on B.23.AE. I have authorised Ev.{Ivan Evernden - coachwork} to make some wind tunnel tests of a body like that on Hall's car but I should like to have the information about the-engine HP. Sg.{Arthur F. Sidgreaves - MD} | ||