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).
Design modifications to prevent a tube from splitting, including reinforcing an aluminium part with steel bolts.
| Identifier | WestWitteringFiles\J\January1923\ Scan95 | |
| Date | 24th January 1928 | |
| TO RO.{C. C. Rose - Export Manager} FROM R.{Sir Henry Royce} Hs{Lord Ernest Hives - Chair} ORIGINAL R4/1A9.1.23. X4220 JAN 24 1928 RECEIVED This matter was discussed with BY.{R.W. Bailey - Chief Engineer} and it was agreed that pressure caused by [stamp obscures text] acting upon the cap jammed the tube over tightly into the foot and so split it. I suggested that the cap should be choc-a-bloc for the present output but I feared that this may be treacherous as some-one may change the caps, lose the liners or come to the conclusion that the cap ought to grip the tube. I therefore suggested that firstly we should fill in the space which weakens the foot and carry the core by side holes in-stead of this core print. This would increase our section of alum-inium, and as the 5/16 bolts appear to be too powerful for the sec-tion I suggested these should be reduced to 1/4 or even 1.BA. as be-ing quite sufficient for the purpose of holding the engine in posi-tion. The reduction in these bolts and the increase of the section could be tested to find out whether it was sufficient to entirely avoid the risk. If not we could cast in the arms a steel U bolt which would reinforce the aluminium and permit the vertical bolts passing between these reinforcing bolts as explained to BY.{R.W. Bailey - Chief Engineer} and as shewn in the sketch. It was intended that these bolts should pass right through to the crankchamber if they were put in after casting and not cast in, and they could be screwed rods which are screwed into a plate and riveted up, the nuts being screwed up on the out-side. In all cases these reinforcing bolts would have to be under initial dead tension to be of any service. R.{Sir Henry Royce} | ||