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).
Component failures during rear axle and chassis testing on a bumping machine.
| Identifier | ExFiles\Box 80\3\ scan0047 | |
| Date | 10th March 1915 | |
| C O P Y. To Wor.{Arthur Wormald - General Works Manager} for Hy.{Tom Haldenby - Plant Engineer} from R.{Sir Henry Royce} Copy to J.{Mr Johnson W.M.} " " Da.{Bernard Day - Chassis Design} " " Na.{Mr Nadin} 12315 (handwritten) COPY (stamped) R9/IB10315. March 10th. 1915. OE877 (handwritten) Re Parts broken on Bumping Machine. Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}9/L2315. Thank you for your report on the rear axle bumping test. You have gone far enough to prove that the improved tube is definitely stronger than the ones we are using. I shall be glad if you will carry the test still further as soon as convenient opportunity arises. With reference to the broken bracket on the frame, am I right when I read that the front horn has broken while bumping the rear axle? If this is so, is it possible that this breakage is due to any attempt at holding the chassis by the front axle ? With reference to the previous failure of the spring bracket, I do not expect that this is due to any want of strength of this part for vertical loads, but it has been principally caused by the fact that running over the bumps causes lateral pressure via the spring. This force causing this breakage may be less in the type where the spring is under the axle, and also may be less in the case of the rear portion of the spring being split. | ||