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).
Brake system testing, detailing issues with springiness and including a performance comparison with a Delage vehicle.
| Identifier | ExFiles\Box 21\4\ Scan074 | |
| Date | 23th July 1920 | |
| Contd. -5- Hs{Lord Ernest Hives - Chair}2/LG23.7.20. front brakes but there is no compensation for all four brakes. It is possible to disconnect the rear brakes and to operate the front only. On the other hand, it is necessary for the adjustment of the brakes to be correct or else either only the front or the rear might be doing the braking. The brakes on the car we have tested appear to be all doing an equal amount of work. We proved this by feeling the temperature of the brake drums after the brakes had been in use slightly for a short time. The operating gear for the brackes is very spingy and even though the braeke pedal is adjusted to its top position. If the braeks are applied hard the pedal goes down on to the floorboards. We found that this springiness is chiefly in the brake drums themselves. The brake drums which are 16" in diameter sprung out-of-truth when the brake was applied .025" We tried the bracking on the car on a wet tarmac road. We found that we could pull the car up in a remarkably short space with no signs of the wheels skidding. We could pull the car up under the same conditions with the hand brake which worked on the countershaft but the car would immediately skid and the back wheels were locked. Below are some comparative by tests we made comparing the brakes on the Delage with the brakes on the R-R.{Sir Henry Royce} BRAKING TESTS WITH FOOT BRAKES. Weight of R.R. 36 cwt. Delage. 36 cwt. Delage fitted with Michelin rubber non-skid tyres all-round . R.R. " Dunlop Magnum tyres all-round. Contd. | ||