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).
Blueprint detailing the calculations and performance graph for the Peregrine Brakes system.
| Identifier | ExFiles\Box 1\10\ B001_X106 TO X 110-page006 | |
| Date | 2nd March 1930 | |
| Title: PEREGRINE BRAKES - R.R. Sch- 192 Reference: Hs.{Lord Ernest Hives - Chair} 692 Diagram Labels: Top Left: 12" DIA DRUM, .325 CAM, 13.150, 5.250, 1.425, 1.625, 1.875, 1.25, 2.0, 3.0, 2.5, 1.5, 3.875 Top Right: 12" DIA DRUM, .325 CAM, 2.0, 4.0, 3.4 Leverage Calculations Table (Far Left): DIRECT TO REAR: (1.425 x 2.0 x 2.5 x 4.8 x 12) / (1.625 x 3.875 x 2.750 x .325) = 220 SERVO TO REAR: (1.425 x 3.0 x 3.4 x 2.5) / (1.425 x 1.5 x 1.625 x .325) = 193 S SERVO TO FRONT: (1.425 x 3.0 x 3.5 x 1.25) / (1.425 x 1.5 x 1.625 x .325) = 301 S Main Data Table (Centre): Headers: SERVO TORQUE MULTIPLICATION (REAR, FRONT), DIRECT TO REAR, SERVO TO REAR, TOTAL TO REAR, SERVO TO FRONT, TOTAL BRAKING, % BRAKING (FRONT, REAR) Row 1: 0, 0 | 220 | 0 | 220 | 0 | 220 | 0 | 100 Row 2: 0.5, 0.6 | 220 | 96.5 | 316.5 | 117 | 433 | 27.0 | 73.0 Row 3: 0.75, 0.9 | 220 | 145 | 365 | 175 | 540 | 32.5 | 67.5 Row 4: 1.0, 1.2 | 220 | 193 | 413 | 234 | 647 | 36 | 64 Row 5: 2.0, 2.4 | 220 | 386 | 606 | 470 | 1076 | 44 | 56 Row 6: 3.0, 3.6 | 220 | 578 | 798 | 710 | 1508 | 47 | 53 Row 7: 4.0, 4.8 | 220 | 772 | 992 | 1440 | 2432 | 59.2 | 40.8 Notes Below Table: RELATIVE VALUES OF TORQUE MULTIPLICATION FRONT TO REAR BY EXPERIMENT (Handwritten): Figures in ink represent condition with revised front cam levers. 2.3.30 Graph (Right Side): Y-axis (left): BRAKE UNITS (0-2000) Y-axis (right): % BRAKING (0-100) X-axis: SERVO MULTIPLICATION TO REAR (0-4) Plotted Lines: TOTAL BRAKING, % FRONT BRAKING, SERVO TO FRONT, TOTAL TO REAR, DIRECT TO REAR, SERVO TO REAR | ||