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).
Analysis of brake distribution and servo torque multiplication with calculations for different schemes.
| Identifier | WestWitteringFiles\T\2January1929-June1929\ Scan027 | |
| Date | 11th January 1928 guessed | |
| contd :- -2- The actual direct braking we are using is only 6% lower than on 14-EX. We think that to use more direct bracing than on 14-EX gives the foot pedal an unnecessary feeling of sponginess. We think that the servo on which these tests were carried out is a very good sample as particular care was taken with it; it is probably above the average. We should like some permanent scheme to get the correct distribution with the measured torque multiplication of the servo. 'SS{S. Smith}' BRAKE DISTRIBUTION - ACCORDING TO N.SCH.2539 - ASSUMED SERVO TORQUE MULTIPLICATION 2.5. ____________________________________ Direct 28.5 Servo to front 20.7 X 2.5 51.8 Servo to rear 24.8 X 2.5 62.0 % to front 43 1/8% _________________________________________________________________ TO N.SCH.2539 - MEASURED SERVO TORQUE MULTIPLICATION 1.43 _____________________________________ Direct 28.5 Servo to front 20.7 X 1.43 29.6 Servo to rear 24.8 X 1.43 35.5 % to front 38% _____________________________________________________________ 'SS{S. Smith}' CARS WITH EXPL: MODIFICATION. _____________________________________ Direct 22.6 Servo to rear. 44.3 Servo to front. 53.3 % to front 44% _____________________________________ Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||