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).
The failure of an end cap on a Marles Steering box due to a deeply drilled oil union hole.
| Identifier | ExFiles\Box 130\2\ scan0083 | |
| Date | 30th July 1936 | |
| Cricklewood, 30th July, 1936. Marles Steering. Attached sketch shows where the end cap failed on one of the Marles boxes. It appears that the screw threaded hole for the oil union B is drilled too far down the end cap and weakening portion A where the extension pipe starts. I have not seen the box myself, but I believe there was quite a considerable amount of slack in the box. If there has been any slack in the cross shaft in the box, this would tend to put a shearing force on the portion A.{Mr Adams} * The box should be in R.R. Exptl. Dept., Derby, by now for investigation. HS{Lord Ernest Hives - Chair}/K.F.Scholes. | ||