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).
Comparative table of servo and brake particulars for 40/50, 20/25, and Peregrine car models.
| Identifier | ExFiles\Box 1\10\ B001_X106 TO X 110-page011 | |
| Date | 7th November 1932 guessed | |
| SERVO AND BRAKE PARTICULARS COLUMN HEADERS: 40/50, 20/25, PERE: PEREGRINE SIDE NOTE: S = TORQUE MULTIPLICATION CAR WEIGHT: 48 CWT, 35 CWT, 28 CWT BRAKE UNITS FROM SERVO BRAKING: R: 272 x S, 220 x S, 193 x S F: 227 x, 304 x S, 195 x S SERVO TORQUE MULTIPLICATION: FORMULA: = 2/μ [FABRIC COT λ / (1 + CAM)] FOR μ = .2: 2.53, 1.55, 1.28 TAKING INTO ACCOUNT ROAD WHEEL DIA. BRAKE UNITS PROP. TO: 38, 26, 17, 20 FOR SAME DECELERATION PEDAL PRESSURE REQUIRED: 100, 106, 130, 110 END THRUST ON SERVO: 1030, 742, 1030, 815 AREA OF SERVO LINING: 12.2, 8.7, 5.5, 7.45 UNIT PRESSURE (P): 85, 85, 188, 121 RUBBING VEL FOR SAME CAR SPEED PROPORTIONAL TO (V): 5, 5.7, 5.6, 6.45 PV: 42.5, 48.5, 105 (SIDE NOTE: HEATING PROP. TO THIS) LINEAR MOVEMENT OF SCISSOR LEVER FOR 1" MOVEMENT OF REAR BRAKE CAM: .83, .57, .59, .57 ANGULAR MOVEMENT: 4.05, 3.23, 3.95, 4.05 NOTCH ADJUSTMENT: 5°, 6° ANGULAR MOVEMENT OF SCISSOR LEVER FOR 1 NOTCH: 20.3°, 15.4° | ||