Letter from Maurice Olley discussing the theory of safe braking, including formulas for ideal front to rear brake force apportionment.
| Identifier | ExFiles\Box 170\3\ img168 | |
| Date | 8th February 1938 | |
| S.H. Grylls Esq., Rolls Royce Limited, Derby. 8. 2. 38. vehicle was forced to move crabwise. Their work is of extraordinary interest but gives very little usable information. I venture to suggest that safe braking at high speeds demands two things - (a). To stop the dive of the car. (b). To apportion front to rear braking in accordance with the deceleration in such a way that the fronts are always about as likely to skid as the rears. Thus for theoretical perfect braking using diagram of enclosed chart. If α = deceleration. Front brake force must always be αW/l (b+αh) Rear " " " " αW/l (a-αh) Ideal Front/Rear ratio = (b+αh)/(a-αh) Yours, Maurice Olley MAURICE OLLEY. | ||
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).