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).
Table detailing the dimensions of servo-operated brakes for various car models.
| Identifier | ExFiles\Box 12\5\ 05-page242 | |
| Date | 2nd December 1928 | |
| DIMENSIONS OF SERVO OPERATED BRAKES. TABLE COLUMNS: TYPE FRONT BRAKES: Arc of Contact of Each Brake Strap (Length, Angle), Width of Shoe, Dia. of Drum. REAR BRAKES: Arc of Contact of Each Brake Strap (Length, Angle), Width of Shoe, Dia. of Drum. TABLE DATA: Type: Silver Ghost & Phantom I | Front Brakes: Length 13.0"*, Angle 99°*, Width 1.70", Drum Dia. 15.0" | Rear Brakes: Length 17.8", Angle 120°, Width 2.00", Drum Dia. 17.0" Type: Phantom I (Later Series) | Front Brakes: Length 11.3"*, Angle 86°*, Width 1.75", Drum Dia. 15.0" | Rear Brakes: Length 15.2", Angle 109°, Width 1.75", Drum Dia. 16.0" Type: Phantom II | Front Brakes: Length 14.0", Angle 107°, Width 1.75", Drum Dia. 15.0" | Rear Brakes: Length 15.2", Angle 109°, Width 1.75", Drum Dia. 16.0" Type: Phantom II (Later Series) | Front Brakes: Length 13.9", Angle 106°, Width 1.75", Drum Dia. 15.0" | Rear Brakes: Length 15.2", Angle 109°, Width 2.25", Drum Dia. 16.0" Type: Phantom II (Locomotive Type) | Front Brakes: Length 14.1", Angle 108°, Width 1.75", Drum Dia. 15.0" | Rear Brakes: Length -, Angle -, Width -, Drum Dia. - Type: 20 H.P. | Front Brakes: Length 11.7", Angle 103°, Width 1.30", Drum Dia. 13.0" | Rear Brakes: Length 14.4", Angle 118°, Width 2.00", Drum Dia. 14.0" Type: 20 H.P. (Later Series) & 25 H.P. | Front Brakes: Length 11.7", Angle 103°, Width 1.30", Drum Dia. 13.0" | Rear Brakes: Length 15.3", Angle 125°, Width 2.00", Drum Dia. 14.0" FOOTNOTE: * INCREASES TO AN ADDITIONAL 3.0" & 23° RESPECTIVELY WITH WEAR. | ||