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).
Extract discussing the locking device and grub screws on Dunlop wheels, noting potential breakages and suggesting an improvement.
| Identifier | ExFiles\Box 1\7\ B001_X15 20 46 50 59-page035 | |
| Date | 28th July 1913 | |
| The Extract from Wm/SHG/28713. Dunlop Wheels. (X.15) Excellent, we never had one case of them creaking or making a noise and getting slack, the locking device always worked satisfactory. The grub screws which hold the cap inside the hub are very liable to get broken, they have large hexagon heads and a small dia pip at the end. In screwing them in it is very easy to break the little pip off and not know it. There is no mark to tell when the holes are opposite, if the hole in the cap was drilled right through instead of half way into it, it would be easier to feel when they were opposite. We had several reports with this as apparent cause. | ||