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).
Modifications to the propeller shaft and gearbox for improved lubrication and oil retention.
| Identifier | ExFiles\Box 179b\1\ img320 | |
| Date | 11th February 1933 | |
| To-Bye from DA.{Bernard Day - Chassis Design} Co-to-Sgr-WOT. He. T. -Wks. ORIGINAL DA.{Bernard Day - Chassis Design}/1/11.2.33. PENGUINE - PROPELLER SHAFT. As referred to in a recent memo (R.{Sir Henry Royce}/M/1.2.33) R.{Sir Henry Royce} has suggested putting the sliding joint of the propeller shaft in an extension of the gearbox, thus avoiding the present transmission shaft and at the same time giving an opportunity of better lubrication of the sliding part. Herewith we send Sch.3687, shewing the main idea. It will be seen that a modification to the rear end of the gearbox casting is called for, and also some alterations to the striking rod bracket. The two cross members immediately behind the gearbox have been moved back, carrying the brake differential with them. As regards the pedal support, we have a scheme for anchoring the horizontal beam to the hand brake lever bracket, which we have not yet sent you. In this case the pedal support is not altered. Sch.3687 shews what seems to be the simplest scheme. There may be difficulty with keeping oil in at the rear end and also in retaining a sufficient quantity in the sliding serrations. We have shewn on Sch.3689 an alternative construction assisting these two points. While Sch.3688 is another alternative which enables serrations larger in diameter than the existing ones to be used, and also ensures a good depth of oil remaining in the serrations. The question of oil being tipped out of this long gearbox when on a steep gradient is rather a difficult one, and we have shewn several suggestions for dealing with this, and shall send some more. There are also some more elaborate methods of lubricating the splines which might be considered, but we suppose the simplest would be tried first. It will be noticed that the propeller shaft is under the 49" specified as the maximum permissible length. DA.{Bernard Day - Chassis Design} | ||