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).
Modifications to lighten the Phantom engine, with comparisons to the Silver Ghost.
| Identifier | ExFiles\Box 18\1\ Scan002 | |
| Date | 1st December 1925 | |
| To BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} c. to CJ. Hs.{Lord Ernest Hives - Chair} X7840 R3/MB.12.25. EAC.7. & 8. X.7770 X.280 X.8840 X.7840e One of these chassis will have a lightened engine. I have arranged with E.{Mr Elliott - Chief Engineer} that we do not attempt to re-design the Phantom for extreme lightness, but that we change such parts as will not seriously interfere with the present jigs and tools, and he is sending you a list of these. we are not proposing at the moment to alter the pitch of the cyl. centres, or any serious alteration to the crankshaft, but merely to lighten the engine as it stands. It will be observed that with the exception of the crankchamber, flywheel, and clutch, there is nothing much heavier than the Silver Ghost, but we think it will be such an advantage if we can reduce the weight on the front wheels that it will be worth while to go one better than the Silver Ghost engine weights if possible. You will remember that we have suggested that the radiator be very carefully watched for weight of brass castings, and unnecessary solder. I was very pleased to hear that you had the fan in hand for duralumin sheet instead of sheet steel. R.{Sir Henry Royce} MALCOM CAMPBELL | ||