Rolls-Royce Archives
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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).
Comparison table of braking specifications for various schemes.

Identifier  ExFiles\Box 73\3\  scan0069
Date  5th June 1924
  
BRAKE COMPARISONS -

First Table:
| BRAKING SCH. | FOOT RATIO TO REAR. | SERVO RATIO TO REAR | TOTAL TO REAR | SERVO TO FRONT | FRONT BRAKING RATIO. | REAR BRAKING RATIO. | TOTAL BRAKING | REAR BRAKING / FRONT BRAKING | SERVO MULTIPN (S) | SERVO CAM. |
|---|---|---|---|---|---|---|---|---|---|---|
| STD 40/50 | 32 | — | — | — | — | 545 | 545 | — | — | — |
| GOSHAWK | 32.4 | — | — | — | — | — | — | — | — | — |
| N.SCH. 1801 | 33 | 24.1 S / 53 | 86 | 31.8 S / 70 | 70 x 15 / 1050 | 86 x 17 / 1460 | 2510 | 1.39 | 2.2 | 45° |
| N.SCH. 1801 II | 25 | 23.7 S / 35.5 | 60.5 | 31.8 S / 47.7 | 715 | 1030 | 1745 | 1.44 | 1.5 | 55° |

Second Table:
| BRAKING SCH. | PEDAL MOVT FOR 1 NOTCH ADJ. REAR BRAKES | PEDAL MOVT TO TAKE UP SERVO CLCE. | TOTAL PEDAL MOVT. FOR 1 NOTCH ADJ. | RELATIVE LAG. | PEDAL MOVT FOR 1 NOTCH ADJ. OF SERVO | SERVO CAM. | CLCE. TAKEN UP ON S PLATES FOR 1 NOTCH ADJ. |
|---|---|---|---|---|---|---|---|
| STD 40/50 | 1.395 | — | 1.395 | — | — | — | — |
| GOSHAWK | — | — | — | — | — | — | — |
| N. SCH. 1801 | 1.44 | .232 | 1.67 | — | — | 45° | — |
| N. SCH. 1801 II | 1.075 | .161 | 1.23 | — | — | 55° | — |

Stamp Text:
ROLLS-ROYCE, LIMITED
PRINT ROOM.
5 JUN. 24
DERBY
  
  


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