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).
Telegram requesting an experimental modification to the brake servo system.
| Identifier | ExFiles\Box 73\1\ scan0094 | |
| Date | 25th January 1923 | |
| A: 66: 11.41 CHICHESTER T: 62 = HIVES ROYCAR DERBY: = R WISHES TO INCREASE LEVERAGE BETWEEN SERVO AND BACK BRAKES EXPERIMENTALLY WILL YOU DO THIS BY REDUCING LENGTH OF LEVER ON SERVO CROSS SHAFT FROM 3 POINTS 250 TO 1 POINT: 625 AT SAME TIME REDUCING LEVERAGE BY HALF OF SERVO BY ALTERING FULCRUM OF HORIZONTAL LEVER ON BOTTOM SERVO SHOE IS STEEL OBSERVER DRUM THE BEST POSSIBLE: = DAY: | ||