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).
Use of shorter connecting rods on a lighter Phantom engine to reduce weight and crankcase height.
| Identifier | ExFiles\Box 65\4\ scan0007 | |
| Date | 2nd February 1926 | |
| To Hs.{Lord Ernest Hives - Chair} from E.{Mr Elliott - Chief Engineer} c. to CJ. c. to R.{Sir Henry Royce} c. to RG.{Mr Rowledge} c. to BY.{R.W. Bailey - Chief Engineer} X8000 E2/M23. 2. 26. RE. LIGHTER PHANTOM ENGINE. X. 8840 X. 8000 X. 8030 In our memo. E1/M21.11.25 we asked for a test to be made of a Phantom engine with the old short rods, to determine whether we could revert to the use of these with the object of saving weight. The maximum possible amount of reduction in dimensions that can be effected is 1 1/4" off the height of the crankcase. As it is desired to get the particulars for the lightened crankcase fixed, it appears to us that the best policy would be to instruct the lighter Phantom engine with the shorter rods. E.{Mr Elliott - Chief Engineer} | ||