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Proposal regarding the 20HP hypoid rear axle, to enable the pinion to be withdrawn for inspection without disturbing the gear.
| Identifier | WestWitteringFiles\U\2January1930-September1930\ Scan015 | |
| Date | 21th January 1930 | |
| BY.{R.W. Bailey - Chief Engineer} [struck through] FROM DA.{Bernard Day - Chassis Design} C. to SS.{S. Smith} HS.{Lord Ernest Hives - Chair} G.{Mr Griffiths - Chief Accountant / Mr Gnapp} to RHG. [struck through] ORIGINAL DAL/M21.1.30. x2066 x535c 20HP. HYPOID REAR AXLE. We have looked into the question of enabling the hypoid pinion to be withdrawn for the purpose of inspecting the bedding without disturbing the gear. We should like to point out that this is a requirement which has never been called for before. It has always been necessary to draw the gear to one side. We see that it can be done on the SS.{S. Smith} because the outer dia. of the rollers on the nose bearing is only slightly more than the distance from the centreline of the pinion to the inside edge of the gear teeth, and the rollers can pass through the tooth gaps. We now confirm that this same result could be obtained on the 20HP. by using the next size bearing, and examining it comparatively we find that it is in a favourable position compared with the corresponding roller on SS.{S. Smith} We have shewn in a table on N. sch. 3023. herewith, how it compares. We suggest that an axle should be fitted up in this way and subjected to the heaviest dynamometer test as soon as possible. DA.{Bernard Day - Chassis Design} | ||