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 showing the efficiency of a well-oiled Bowden cable.
| Identifier | ExFiles\Box 92\4\ scan0041 | |
| Date | 21th December 1934 guessed | |
| EFFICIENCY OF BOWDEN CABLE READINGS TAKEN WITH CABLE WELL OILED PERCENTAGE EFFICIENCY LBS - INPUT μ = 0.264 ANGLE = 16° μ = 0.282 ANGLE = 60° MEAN DIA = 70" μ = 0.214 ANGLE = 90° MEAN DIA = 42" μ = 0.214 ANGLE = 180° MEAN DIA = 15" TABLE: 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 | ||