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).
List of points for review and actions taken on various vehicle components.
Identifier | ExFiles\Box 53\4\ Scan066 | |
Date | 5th December 1923 guessed | |
-3- POINTS TO BE DEALT WITH. ACTION TAKEN. 14. Clutch Trunnion G.72. Wear has taken place in the pivot holes. The trunnion screws could go further in which would give longer bearing surface. Reply from BY:- We propose to issue a design to the Experimental, including phosphor bronze bushes of larger surface contact. I have a design in hand for this purpose. 15. Engine Gears. The camshaft wheel is .002" undersize in tooth thickness, and was so as originally fitted. We think that the limit should be on the plus side rather than on the minus, as when the crankshaft bearings are re-bedded to take up wear it reduces the centre between the crankshaft and camshaft. This does not allow the gears to have a second lease of life after taking up wear in the crankshaft bearing. Reply from BY:- We think this paragraph has been written under a misapprehension - our usual procedure is to produce the phosphor bronze gear .002" undersize to accommodate the variation in hardening on the case hardened wheels. We do not agree with H's suggestion that when the gear tooth is undersize the crankshaft rebedding is more difficult than if the gears had been oversize. The conditions, as a matter of fact, are precisely the same in each case so far as rebedding is concerned. The limit in this connection is the depth of the case hardening, and a reduction of the pitch line thickness, so far as a few thous. is concerned, does not affect the issue. 16. Governor. The thrust race U.442 is badly pitted. Reply from BY:- We think this is a matter of alignment of the thrust race, and not a question of design or material. 17. Fan. A considerable amount of slack exists in the first portion of the large ball bearing housing. Reply from BY:- We consider the housing for the ball bearing in question is weak. It has, however, been exactly the same from the start: I am producing a stronger housing which will mean one or two new parts, and submitting same to Hs.{Lord Ernest Hives - Chair} We think the slack in the bearing was produced by the ball bearing screws tightening, and being forced in when fitted originally. We agree that the housing ought to be sufficiently strong to withstand this. 18. Engine Controls. The throttle control spindle is very slack in the bronze bushes which are carried in the aluminium bracket E.22227. The intermediate bracket U.1637 for the throttle control is loose in it's bearing. Reply from BY:- The same stricture applies to this as to item 8. (Engine Controls.) 19. Front Axle. The ball end for the top steering arm is pitted rather badly, and the same applies to the corresponding contact pieces. Reply from BY:- Nothing can be done with this without serious redesigning - we do not think it is a common fault. | ||