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).
Lockheed braking system's intensifier and the potential for adding a forward-only servo.
| Identifier | ExFiles\Box 179b\1\ img102 | |
| Date | 1st October 1932 guessed | |
| (2) DA.{Bernard Day - Chassis Design} has pointed out that the Lockheed system has an intensifier which in effect alters the leverage after the slack has been taken up, that is to say, hydraulically it has two ratios of leverage. This may account for this particular device giving good direct braking. We do not propose to attempt a similar system because it demands a certain complication of valves and springs which are undesirable, and might fail at a critical moment. We therefore think it is quite possible we shall have to refer for help to a servo, and perhaps EY. will tell us if the one way driven freewheel servo of the Hispano has become a free patent, because in this particular instance of a light car it will not be necessary to have the servo assisting backwards, and the simplest device we can suggest would be a servo assistance forward only. This is what we are working at. A point of interest that has arisen in connection with the servo is that it is not at all difficult to get in owing to the gearbox being pushed back under the driver's seat. Therefore it will not require drastic changes in the box should we decide to fit a servo, and we are looking to the possibility of putting on suitable facings so that the pieces for the servo can be added if found necessary. R.{Sir Henry Royce} | ||