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 performance, front wheel braking proportions, and comparisons with other cars.
Identifier | ExFiles\Box 13\1\ 01-page13 | |
Date | 4th March 1932 | |
PN.{Mr Northey} From Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} c. to Sg.{Arthur F. Sidgreaves - MD} c. to Bt.{Capt. J. S. Burt - Engineer} Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}7/MA.4. 3. 32. ROLLS ROYCE BRAKES. Replying to your Pn.{Mr Northey}2/TT.2.3.32, we are of the opinion that the proportion of braking on the front wheels of our cars is correct for the average driver who must never find himself in the position of having the front wheels locked on a slippery road. According to the motor papers the brakes on the 25HP are up to the best that have been tested but the P.II brakes are not as good as any of the Bentley cars not in fact of most sports cars, the manufacturers of which invariably have at least 50% of the braking in front and sometimes employ axle twist to give an additional servo effect. The ratio of braking front to back on the N.2 series 35º cam angle Phantom is 40:60 assuming an efficient servo. The front braking effort is dependent entirely on the servo. Hs{Lord Ernest Hives - Chair}/H.{Arthur M. Hanbury - Head Complaints} Grylls. | ||