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 change for planet bolts to reduce the risk of breakage.
| Identifier | WestWitteringFiles\B\June1918\ Scan2 | |
| Date | 16th June 1918 | |
| ORIGINAL. To BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} Copy to CJ. " " OY. 16th. June, 1918. R9/G16718. 3 RE PLANET BOLTS. X .3168 D To lessen the risk of these being broken, we are fitting a tubular bolt so as to resist the centrifugal force better, and also special nuts with spherical seatings, and end castelllations, the latter so as to lessen the risk of the bolt being over-tightened, and the whole so arranged that in-accuracy of workmanship cannot cause a severe bending stress on the bolt, because we fear at times, in spite of all pre-cautions, a bearing may be so fitted that the end washers clamp the bearing. R.{Sir Henry Royce} | ||