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).
'bump' test failure of the 20 HP steering bottom support bracket.
| Identifier | ExFiles\Box 106\3\ scan0061 | |
| Date | 22th April 1926 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair}/ACL. c. to BJ. RG.{Mr Rowledge} c. to E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} Wor.{Arthur Wormald - General Works Manager} Handwritten: X5430 Hs{Lord Ernest Hives - Chair}/ACL1/LG22.4.26. Handwritten: X4268 (struck through) Handwritten: X5430 20 HP. STEERING ON 'BUMP' TEST. We have carried out some bumping tests on the new type 20 HP. steering - F.53935 - having the outside pendulum lever and the new front axle. Only 33 minutes running was obtained before the 'bottom support bracket' failed at the holding down flange. This bracket was constructed of brazing metal which was the material instructed for this experiment. [Image of a blueprint sketch with the label 'FRACTURE'] The top part of the flange bracket was torn completely away from the flange leaving the holding down lugs on the flange attached to the steering box. The pieces shewed signs of considerable distortion, apparently before failure, as indicated in the sketch below :- [Image of a blueprint sketch showing distorted components] contd :- | ||