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).
Test note regarding the performance of standard brakes holding a car on a gradient.
| Identifier | ExFiles\Box 180\M4\M4.1\ img001 | |
| Date | 3rd November 1911 | |
| R.R. 148 (30 m) (W 585. 16.6.11) G 1737. X383 X956 3/11/11 2500. Brakes 1482 fitted with standard brakes of that series held the car total weight of 5172 lbs on a gradient 1 in 4, each brake held the car. RA 3/11/11 See Sheet on CRS file. carded B.OHy 5172 lb = 46cwt-1qr 6lb EH = Ernest Hives! | ||