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).
Performance graph for the 9 B.V. front and rear brake system.
| Identifier | ExFiles\Box 98\3\ scan0083 | |
| Date | 14th March 1939 | |
| 9 B.V FRONT & REAR BRAKES EFFICIENCY TO FRONT = 71.5% @ 60 LBS ON PEDAL " " REAR = 83.5% @ 60 LBS " " " " REAR DIRECT = 75% @ " " FRONT WEDGE REAR WEDGE REAR DIRECT PEDAL LOAD TO LOCK LINING T.S.M.B LBS. PULL TO WEDGE LBS. LOAD ON PEDAL 35° SERVO CAMS VG 90 LINING PEDAL RATIO TO FRONT 41 x S " " " REAR 41.3 x S " " " REAR DIRECT 28.2 S = SERVO MULT: FACTOR | ||