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).
Clarifying a request for information on pedal pressure for braking, referencing Hispano and Isotta.
| Identifier | ExFiles\Box 22\1\ Scan023 | |
| Date | 17th November 1923 | |
| X.4214 To Hs.{Lord Ernest Hives - Chair} from Da.{Bernard Day - Chassis Design} Dal/M17.11.23. Thank you for the information about Hispano. We note you are going to bring us any additional information when you come. I should like to mention however that I have not made myself clear as to what we meant by pedal pressure. We do not know whether you can conveniently arrive at it, but what we are really interested in is the number of lbs. a man pushes on the average when getting maximum braking. We have hitherto estimated this as being 150 lbs. or an average man's weight, but some of the figures we have seen, especially those on the Isotta lead us to think that it must be very much more sometimes. Da.{Bernard Day - Chassis Design} | ||