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).
Proposal to increase the diameter of a reduced rocking shaft to equalize twist and prevent fracture.
| Identifier | ExFiles\Box 95\1\ scan0536 | |
| Date | 15th August 1939 | |
| - 2 - Mx{John H Maddocks - Chief Proving Officer}/SB.{Mr Bull/Mr Bannister}10/G.15.8.39. (a). The reduced rocking shaft is at least as good as the standard shaft from a driving point of view. (b). No twist will occur under normal driving conditions or ordinary "curb bumping", but some twist will occur under heavy impact. (c). The possible angle of twist before fracture occurs is more than three times the total lock angle, so it will be impossible for anyone to twist a shaft off in an accident. (d). We have now got so much in hand that we would like to increase the reduced shaft diameter from 1.000", which is equal to the bottom of the splines, to 1.050" in order to equalize the amount of twist which at present is more on the reduced portion than at the end of the splines. We propose to release the Depot Sheet based on the above. Mx{John H Maddocks - Chief Proving Officer}/SB.{Mr Bull/Mr Bannister} | ||