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).
From R. to H.S. discussing design considerations for various engine components.
| Identifier | Morton\M1.1\ img012 | |
| Date | 8th August 1921 | |
| To HS.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} -3- R10/G8/8/21 Contd. (7) RETAINING BOLT FOR SPRING DRIVE. Owing to cost of production it would not pay us to make the bush and stud solid. We will, however, take some precautions to prevent it turning. (8) INDUCTION AND EXHAUST PIPES. With reference to increased clearance of nuts on induction pipe, we will see whether this is possible, or adopt your suggestions. We fear brass nuts are hardly suitable xxxxbeingxxxx that they lose their elasticity at a high temperature, but agree to you trying them. (9) NOISE FROM OIL PUMP. Regarding the noise of the oil pump, we should fear that skew gears would cause leakage. Previously, to the best of my memory, we got over the trouble by making the gears more oblique. Perhaps they want to be more than 20 degrees. We are assuming that you have tried the usual 20°. (10) SUSPENSION OF ENGINE. We hope your fears that the flexibility will be excessive will be unfounded. We will do nothing until later. (11) CARBURETTOR. I do not know any real reason why the submerging of the float should have any advantage, but we expect that the floatchamber and needle valve will have to be enlarged in diameter. We should not expect much variation in level due to change of pressure, as we intend to use autovac feed, and the pressure on the needle valve would be fairly constant and only a small amount. Such an arrangement, however, although the pipes are short, may require a larger area of needle valve opening. This will have attention as soon as Mr. Elliott returns from his illness. (Contd.) | ||