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).
Car testing, gearbox designs, and the unsatisfactory state of the E.A.C.3 brake system.
| Identifier | ExFiles\Box 73\2\ scan0157 | |
| Date | 15th December 1923 | |
| Y9940 To WOR.{Arthur Wormald - General Works Manager} from HS.{Lord Ernest Hives - Chair} Hs{Lord Ernest Hives - Chair}1/T15.12.23. With reference to the attached (CJ1/E4.12.23):- (1) We assume that any car PN.{Mr Northey} would take away away to test should be of a type which will be delivered to customers, as it is now definite that E.A.C.1 engine would always be used in connection with the 4-speed gear box, for which at present no designs have been received at Derby. We think perhaps that April, if anything, is optimistic. We still wish to take advantage of PN.{Mr Northey} to test an experimental car. We recommend that this shall be an E.A.C.3. One reason for this is that it is admitted that the brake arrangement on E.A.C.3 will have limitations. It is therefore important that Sales should know what these limitations are. (2). 6 to 8 months. (3) The brakes for E.A.C.3 are in an unsatisfactory condition. The new design of 4-wheel brakes which are being designed for E.A.C.1 & 2 is very different from the scheme arranged for E.A.C.3. We feel fairly confident with the schemes arranged for E.A.C.1 & 2, but with the arrangement so far for E.A.C.3 we feel that the brakes will have obvious limitations. The fact that R.{Sir Henry Royce} has found it necessary to depart so rapidly from the design is proof of this. We should anticipate it will be at least a month before we have an E.A.C.3 fitted with the latest arrangement of brakes. We only received the drawings this week and there are many more to follow when we have decided experimentally on the best type of brake. (4) The Servo, which is on the 3-speed box, would not be entirely satisfactory with our present knowledge. Hs.{Lord Ernest Hives - Chair} | ||