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).
Recurring failure in cast-iron pistons on repair cars, recommending their production without steel stiffening plates.
| Identifier | ExFiles\Box 181\M11\ img185 | |
| Date | 31th May 1919 | |
| To R.{Sir Henry Royce} from EH. c. to CJ. c. to BN.{W.O. Bentley / Mr Barrington} c. to E.{Mr Elliott - Chief Engineer} c. to EY. c. to Hm.{Capt. W. Hallam - Head Repairs} H1/LG31.5.19. X.2535. RE LIGHTING CAST-IRON PISTONS USED ON REPAIR CARS It is a frequent complaint on these cast-iron pistons that after the engine has been run for some time, the steel stiffening web falls out of the piston and drops into the bottom half. It often happens that the pistons are damaged with these plates breaking away. The parts which fail are the 5 BA studs which hold these plates. We carried out some tests before the war and found that these stiffening plates plates were of very little use. We recommend that until we are in a position to use aluminium pistons for repair work, these cast-iron pistons should be made without the steel stiffening plates. EH. (upside down footer text) H.R. 235A (500 I) (S.D. 408. 26-4-17) Bm/2/56/13. | ||