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).
Proposal to experiment with fitting Hispano connecting rods to the Phantom engine to improve smoothness.
| Identifier | ExFiles\Box 65\4\ scan0293 | |
| Date | 9th September 1927 | |
| X7030 To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}=ACL. c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} c. to EY. Hs{Lord Ernest Hives - Chair}/ACL1/LG21.9.27. PHANTOM CONNECTING RODS. With regard to the proposed lightening of the Phantom conn. rods in order to increase the smoothness of operation of the engine and place the master resonant period further away from the speed range, we find we can, without much difficulty, test the actual Hispano conn. rods on the Phantom engine. The Hispano conn. rods are of tubular construction but at the moment we have no record of the weight of these and it is thought that perhaps some useful information would result from a test made with these conn. rods in our engine. These conn. rods are .300 longer than the Phantom and take 1.275" dia. gudgeon pins. The big ends are the same diameter as our standard rods. We therefore propose, for the purpose of experiment, making some pistons to suit the rods. This can very easily be carried out with pedestal type pistons. Hs{Lord Ernest Hives - Chair}/A.{Mr Adams} C. Lovesey. | ||