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).
Drawing of a Hispano front brake drum made from aluminium with a steel liner.
| Identifier | WestWitteringFiles\L\2Jan1924-March1924\ Scan22 | |
| Date | 1st January 1924 guessed | |
| [ "HISPANO FRONT BRAKE DRUM.", "MATERIAL. ALUMINIUM. WITH STEEL LINER.", ".920", ".210", ".30", "10 M/M STUDS", "4.925 DIAM.", "8 M/M DIA", "2.50", ".320", ".180", "STEEL LINER.", "15.75 DIAM.", "WEIGHT = 16 lbs. 9 oz" ], | ||