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 specifications for an aluminium piston for repair cars.
| Identifier | WestWitteringFiles\E\July1920\ Scan3 | |
| Date | 2nd July 1920 | |
| To D.M. from H.{Arthur M. Hanbury - Head Complaints} Copy to G.V. [Struck through] " " B.W. [Struck through] " " H.S. [Struck through] " " D.M. [Struck through] ORIGINAL [Stamp] E2/G2/7/20. 3 EFC. x 3559. RE ALUMINIUM PISTON FOR REPAIR CARS. Referring to your M.{Mr Moon / Mr Moore} scheme 4444, so far as I can gather no information has been sent to you concerning this. There are, however, two points of importance which I believe Mr. Royce wishes to be raised. One is that it is not desirable for the bands of metal between the piston rings to be less than .125" wide. The other point is that the coned top to conform to our standard practice for 4.5 diameter pistons should be .400" high instead of .600". The alteration to this latter feature should give you more room for the piston rings, and the bands between the rings, provided there is still enough of the cylinder bore to prevent over-running. E.{Mr Elliott - Chief Engineer} RECEIVED 5 JUL 1920 S D [Stamp] | ||