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).
Letter discussing modifications to lighten and simplify the Phantom engine for sports applications, including changes to the crankshaft.
| Identifier | WestWitteringFiles\Q\July1927-September1927\ Scan080 | |
| Date | 29th August 1927 | |
| ORIGINAL. CONFIDENTIAL. HS.{Lord Ernest Hives - Chair} DY.{F R Danby} FROM R.{Sir Henry Royce} R4/M29.8.27. C. to BJ. WOR.{Arthur Wormald - General Works Manager} LIGHTER & SIMPLIFIED PHANTOM ENGINE X8770 X7770 X5010 X5770 FOR SPORTS, AND EAC. 10. We are sending you within the next few days most of the drawings for lightening and simplifying the Phantom engine. We have found it impossible to do this in half measures, and shall be pleased if you will at once get a move on in detailing the parts and making them experimentally. We have spent an enormous amount of time on this, and we cannot help believing that you will be very pleased with the modifications, which we think will enable you to get a satisfactory engine for less money. INDIA 3. We hope you are making some progress with the frame for this experimental chassis. We have also sent you the engine crankshaft which is arranged so as to make no alteration to the con. rods, but to increase the stiffness, as in our last attempt, by making the bearings larger in diameter, but also slightly longer, so as to get a better oil & seal, by altering the form and proportion of the webs. The spring drive is also altered to the G.L. scheme, which latter will be sent tomorrow. We are therefore arranging that both of our chassis engine shall have a slightly higher maximum speed, with slightly better fill up, permitting better performance. R.{Sir Henry Royce} | ||