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).
Instructions for rectifying a crackling Bentley rear brake drum.
| Identifier | ExFiles\Box 120\1\ scan0218 | |
| Date | 1st October 1937 | |
| 1028 To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale}4/AP.1.10.37 BENTLEY BRAKE DRUM The N.S. rear brake drum just taken off 6.B.1V. has a slight tendency to crackle. To see if we can stop this will you please:- (1) Remove races and soak drum in an oven at 230ºC. for 20 hours (it has already had this heat treatment once) (2) Remove liner and replace with similar nickel plated liner, having the correct interference fit (.026" - .030") (3) Replace on car 6.B.1V. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | ||