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).
Increasing the number of bolts on the Bentley rear axle to prevent them from stretching under road conditions.
| Identifier | ExFiles\Box 84\4\ scan0163 | |
| Date | 23th March 1937 | |
| 202 [strikethrough]BY/DMC[/strikethrough] c. Rm{William Robotham - Chief Engineer}/Grys. [strikethrough]c. DMc[/strikethrough] BY.3/G.23.3.37. BENTLEY REAR AXLE. RE: BOLTING OF AXLE TUBE TO CENTRE BOX. Would you kindly arrange to introduce 18 bolts instead of 12, the same diameter as at present, with the object of preventing the stretching of the bolts which is occurring regularly in France under road conditions. The increase of the number of bolts will relieve the stress in the flange of the tube by increasing the number of points at which the tube is held. This point in the past has proved to be somewhat weak & although it was strengthened up it is evident from the stretching of the bolts that the stresses are still very high. We should follow the present practice entirely except for increasing the number of bolts. BY.{R.W. Bailey - Chief Engineer} RM{William Robotham - Chief Engineer} | ||