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).
Page discussing improvements and alternatives for a chassis lubrication system, including flow rate data.
| Identifier | WestWitteringFiles\Q\2April1927-June1927\ 55 | |
| Date | 14th April 1927 guessed | |
| contd :- -2- No. Hole dia. Pin dia. Approx. C.C. per min. Eng.oil at room temp: Approx. drops per min. CO .063 - ? .03 .6 fractional. 1 .063 .061 .15 3 2 .063 .060 .25 5 3 .063 .059 .40 8 4 .063 .058 .63 12 5 .063 .057 1.00 20 6 .063 .056 1.50 30 The number of drops 'per shot' which for any design is approximately constant and independent of temperature, cannot be stated apart from the system as a whole, since it depends on the total of the orifices in the system. (5) A rearrangement of the system (suggested by Hy.{Tom Haldenby - Plant Engineer}) is in hand which will as far as possible take all drip-plug connections as individual branches off a common 'main' (which may be 5/16" or 1/4" pipe for the sake of strength). Thus if any one of the small pipes breaks and has to be pinched up only one fitting is put out of action. (We have never had a broken pipe except a few split in bending during assembly.) We have discussed this with Bijur who agrees in principle but objected to the consequent increase in the number of pipe joints. On our explaining our preferance for the banjo type fitting, Bijur agreed that the proposed revision was good. (6) Improvements in the feed to the front axle and side steering tube are being made, using for the axle feed a torsion-spring coil on the inside of the left rear shackle bolt, where it is clear of the exhaust pipes. The feed to the side steering tubes is no neater than the present scheme but causes lower stresses in the coils. It is sheltered behind the well in the left mud-guard in which the pendulum lever works. We have not found anything to recommend the neater scheme of lubricating the rear ball joint by oil fed to the rocking shaft and passing down a long drilled hole in the pendulum lever (as used by Packard) because - (a) We do not want to drill radial holes in the rocking shaft (because of weakening). contd :- | ||