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).
New cast aluminium piston design with 'H' webs as an alternative to a previous design.
| Identifier | ExFiles\Box 66\1\ scan0157 | |
| Date | 30th November 1927 | |
| X. 8040 E2/M30.11.27. BY.{R.W. Bailey - Chief Engineer} from E.{Mr Elliott - Chief Engineer} c. to BJ. Hs.{Lord Ernest Hives - Chair} EAC.14 - CAST ALUM: PISTON WITH 'H' WEBS. Herewith we send drg. LeC.2495 shewing the above. This piston has been created as an alternative to LeC.2434 - cross web die-cast piston - should the latter prove too weak across the section of the horizontal split where we had pistons break on the 10,000 mile tests in the early part of 1925. LeC.2495 is however not very suitable for die-casting, as so far as we can see it is not possible to make a metal core for the portion above the piston pin bosses which can be drawn away in sections. Experimental pistons of this pattern should however be tried in reserve against LeC.2494. E.{Mr Elliott - Chief Engineer} | ||