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).
Design and testing of unsplit Bentley pistons.
| Identifier | ExFiles\Box 86\2\ scan0065 | |
| Date | 15th September 1933 | |
| X236. To Hs.{Lord Ernest Hives - Chair} from E.{Mr Elliott - Chief Engineer} c. Wor.{Arthur Wormald - General Works Manager} C. By.{R.W. Bailey - Chief Engineer} Mx.{John H Maddocks - Chief Proving Officer} Sft.{Mr Swift} Bentley Pistons. In addition to the semi-split pistons which you are at present running, to design [LeC. 3447] we think it would be useful to try a set of the same pistons in a car entirely unsplit. Naturally it will be necessary to make tests to find out what clearances will be satisfactory for maximum power and maximum speed on the bench, and the object of the experiment will then be to see how the pistons behave under general operational conditions. No drawing would be required for this as the existing castings would be suitable, but in the event of such a piston being successful some appreciable weight saving would be effected by making the piston skirt of the same thickness all round. Handwritten Notes: [Top Right, circled] Should not this read LeC, 3493 - Yes. [Next to drawing] LeC 3493 Thin Type [Below drawing] What is wanted is solid piston to Le C3447 [Signature area] E.{Mr Elliott - Chief Engineer} E/JNR.{Charles L. Jenner} | ||