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).
Request for testing on Bentley III front suspension parts, including rubber bushes and torque arms.
| Identifier | ExFiles\Box 100\1\ scan0032 | |
| Date | 1st September 1937 | |
| [Handwritten] J [Handwritten] 446 [Handwritten] 200B To HPS.{Horace Percy Smith - Experimental Factory Mgr} From Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} Rm{William Robotham - Chief Engineer}/Les.8/MH.{M. Huckerby}1.9.37. BENTLEY III. Front Suspension Tests. We should like W.Bell to carry out the following tests on Bentley III Front Suspension parts. (a) Rubber Bushes. (b) Torque Arms. Rubber Bushes. Packards use the Inlox type bush which is only produced in U.S.A. We have now received samples of similar rubbers produced by Silentbloc Ltd. It is desired to learn the relative lives of these rubbers. For Bentley III we have the following requirements for the 2 sizes of bushes. (1) 1.312" diameter. Max journal load 1100lbs. Max end load 950lbs. Angular movement to Bump 9° Angular movement to Rebound 13° (2) 1.500 diameter. Max journal load 690lbs. Max end load 490 lbs. Angular movement to Bump 14 1/2° Angular movement to Rebound 24° Will you please apply the maximum loads to the bushes and oscillate the inner member through the correct angular movement whilst taking deflection figures for thrust and journal movements. Torque Arms. We have received from the Projectile & Engineering Co. Ltd. some sample torque arms to FB2924. There are 2 torque arms marked A which have been arc welded and 2 marked C which have been carbon arc welded. Will you please load these torque arms measuring the deflections up 1500 lbs. as shown on the attached sketch. Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} | ||