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).
Testing procedures and potential improvements for foot brakes, including water-cooling and Ferodo liners.
| Identifier | ExFiles\Box 26\4\ Scan023 | |
| Date | 2nd July 1914 | |
| To Hy{Tom Haldenby - Plant Engineer} from R.{Sir Henry Royce} Foot Brakes. a comparison to see how our central brake with ferodo liners would work, if water cooled on the inside of the rim. We might also try if the central brake were used on a chassis with parallel control back axle water cooled and with ferodo liners would be a perfect scheme for long down hills. We ought to try and get a standard with which to compare the efficiency of brakes, taking the engine at such a speed as to develop say 40 HP., say 1000 revs., and with the engine on the top gear, see whether the brake is capable of standing this horsepower for a given time in minutes, before it fails through over heating, and also find the power for gripping the car. We ought to take the engine doing the same horsepower, and see whether it will pull up the engine on say the second gear. A little experimenting would find out what standard is best to adopt. Since it has been found that our old central and side brakes may be considered fairly efficient, both for long down hills and for pulling up the car on a steep incline, we might make the capacity of these a standard from which we ought not to fall short. R.{Sir Henry Royce} | ||