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).
Successful use of stamped crankshafts over ordinary forged ones and recommending their adoption.
| Identifier | Morton\M8\ img037 | |
| Date | 1st November 1917 | |
| B.J. from R.{Sir Henry Royce} c. to Wor.{Arthur Wormald - General Works Manager} c. to Wd.{Mr Wood/Mr Whitehead} c. to E.H. ORIGINAL RECEIVED 6 NOV 1917 Re - Crankshaft Forgings. X.2473. With reference to the use of stamped crankshafts in preference to those of the ordinary forged variety, I learn that the former have been particularly successful on our engines, and, in fact, that out of 200 stamped cranks used on the "Eagle" three only were scrapped and this on account of flaws and not hair cracks. The stamped crankshaft, it would appear, is free from the hair crack trouble, which is at present causing scrap and delay. I think you ought to see Sir William Weir and ascertain if he can induce Vickers to make a larger proportion of our crankshafts, so as to reduce the waste in condemned ones through hair cracks, at present causing much loss at the forge and at our works. One would expect that Vickers could easily make the whole or nearly the whole for our output which at the moment would save an immense amount of wasted and unnecessary work. Since this method is now a proved success we think it should be adopted as soon as ever possible, because ordinary forgings are proving such a frequent failure. R.{Sir Henry Royce} | ||