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).
Performance of fork and blade versus articulated connecting rods for the 'Eagle' engine.
| Identifier | ExFiles\Box 179b\1\ img314 | |
| Date | 6th February 1933 guessed | |
| (2) (8) I believe that the first 'Eagle' shews that the oil film was not replaced quickly enough even with articulated rods, and one must conclude that the fork and blade type is much worse because the oil can so easily escape under the heavy loads. Care would have to be taken where the feed holes to the blade were placed. E.{Mr Elliott - Chief Engineer} will know my views on this point, but it is not an easy problem in this type of rod. (9) Whatever should prove the best lining for the crankpin bearing I feel forced to conclude that - (a) the articulated rod is better than fork and blade, and (b) that a hardened shaft is better than an unhardened one for the surface of the bearing, and its danger from seizing, both of which I have for months and years asked to be adopted or condemned. R.{Sir Henry Royce} | ||