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).
Secret memo detailing chassis modifications to fit a new engine, including lengthening front springs and repositioning the radiator.
| Identifier | WestWitteringFiles\K\October1923\ Scan140 | |
| Date | 19th October 1923 | |
| TO BX. FROM R.{Sir Henry Royce} SECRET RL/M19.10.23. c. to [strikethrough]CJ. RH.{R. Hollingworth}[/strikethrough] HS.{Lord Ernest Hives - Chair} E.{Mr Elliott - Chief Engineer} A.{Mr Adams} C. 11. X9970 In fitting this engine to the present chassis there is about 2" of room to spare. As we do not want to waste this room, as far as we can see we shall use it as follows:- The front springs will be 3" longer namely 45" by moving the rear bracket, shackles will be fitted to these springs at the front as well as the rear. The width and shape of the frame will be as at present, but moving the axle back will have a slight advantage in increasing the stiffness of the front end of the frame by the natural increase of depth. After placing the engine with the cylinder block 1" clear of the present dash, the radiator will be placed relative to the fan, the same as in EAC. having louvres on its face. Close up under the louvres and the matrix in the shallow part of the tank will be placed a straight tubular cross member 2" or 2½" dia. Further forward, about the position of the finish of the diagonal stays will be a second cross tube of comparatively small dia. - 1¼" to 1½". The diagonal stays will start from where this joins the frame to the stout tubular cross member already mentioned, and also the diagonal stays will be fitted to give lateral stiffness to the bay between the radiator and the rear engine supports. The radiator will stand on tubular cantilevers fitted into the flange forging of the large tube. The tubular stay will be from the top of the radiator to the dash as in EAC. and Goshawk. By this scheme the radiator can be as wide as the inside of the frame. It will be as low as will be (1) | ||