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).
Maximum safe diameter for skimming brake drums before they must be scrapped.
| Identifier | ExFiles\Box 102\6\ scan0195 | |
| Date | 12th February 1937 | |
| 16 DK F/A contents K/KC. Hd{Mr Hayward/Mr Huddy}/SB{Mr Bull/Mr Bannister}25/HR.12.2.37. re BRAKE DRUMS. With reference to your K/KC/DPB/ 11.2.37., we think it is safe to skim out these brake drums to 12.100" diameter. The drums should be scrapped if the wear necessitates boring out beyond this diameter, as the brakes will be too spongy. Hd{Mr Hayward/Mr Huddy}/SB.{Mr Bull/Mr Bannister} | ||