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).
Graph and table detailing the efficiency of a Bowden Cable at various angles and loads.
| Identifier | ExFiles\Box 84\2\ scan0245 | |
| Date | 21th December 1934 guessed | |
| M & A PERCENTAGE EFFICIENCY LBS - INPUT EFFICIENCY OF BOWDEN CABLE READINGS TAKEN WITH CABLE WELL OILED GRAPH DATA: M = 0.264, ANGLE = 16° M = 0.282, ANGLE = 60°, MEAN DIA = 70" M = 0.214, ANGLE = 90°, MEAN DIA = 42" M = 0.214, ANGLE = 180°, MEAN DIA = 15" TABLE DATA: ANGLE CHANGE OF DIRECTION OF FORCE | 180° | 90° | 60° | 16° EFFICIENCY AT 300 LBS INPUT LOAD | 51 | 71.5 | 78 | 93 COEFFICIENT OF FRICTION AT 300 LBS | .214 | .214 | .282 | .264 EFFICIENCY AT MAXIMUM LOAD | 49.5 | 72.5 | 79 | 86 EFFICIENCY AT PULL OFF SPRING LOAD | 41 | 62 | 70 | 70 | ||