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).
Report page detailing rigidity figures and data from deflection tests on pressed and cast steel torque arms.
| Identifier | ExFiles\Box 127\1\ scan0357 | |
| Date | 9th May 1938 guessed | |
| -3- No deflection of the yoke took place when the angle was increased to approximately 112° for Bentley III and 105° for the Packard - see Fig.II. Some further figures have been obtained for the rigidity of the lower triangle B.III with both pressed and cast steel torque arms and with and without a compression member between them. The apparatus was set up as in Fig. IV and the following data obtained. | | Bearing from A.{Mr Adams} to D.{John DeLooze - Company Secretary} | Bearing from D.{John DeLooze - Company Secretary} to C. | Bearing from C. to B. | | Total bearing A.{Mr Adams} to B. | |---|---|---|---|---|---| | Pressed steel torque arm. | .004" | .024" | .022" | .008" | .058" | | Cast steel Torque arm. | .014" | .033" | .005" | .008" | .060" | | Pressed steel TA + strut | .005" | - | - | - | .013" | | Cast steel TA + strut. | .013" | - | - | - | .023" | NB. The above figures were obtained for the strut in tension because of ease in setting up the apparatus. The strut however is amply strong in compression - no buckling occurring. RM{William Robotham - Chief Engineer}/Kennington. | ||