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).
The condition of a carbon thrust bush and rotor, including a pump test chart.
| Identifier | ExFiles\Box 149a\1\ scan0062 | |
| Date | 19th November 1934 | |
| -2- Hs{Lord Ernest Hives - Chair}/WB.{Mr Brazier/Mr Bell}2/MA.19.11.34. Cont'd.{John DeLooze - Company Secretary} The face of the carbon thrust bush was in good condition, being only very slightly worn, and containing two or three small "pit" marks. The corresponding thrust face on the S/S rotor shaft showed signs of excess heat, and was very lightly grooved. The bedded surface of the carbon gland ring - taken generally - was in good condition, the mirror finish being well maintained - except for a narrow section at the inner diameter which was rather rough. The polished gland face of the rotor (S/S) was badly pitted, in fact patches of the surface had "flaked". Apparently this was due to electrolytic action which takes place when carbon and stainless steel are in contact in the presence of water. The new rotor which is being produced in BZ/PC in conjunction with a Nitralloy shaft - also in production - should overcome this difficulty. TEST CHART. Pump. Temp. Delivery Time Time* Observations. R.P.M. °C. pressure run. stationary. lbs/sq.in. Hrs. Hrs. 4500 95-100 10 3.0 - O.K. - - - 44 O.K. 4500 95-100 10 3.0 - O.K. - - - 1 O.K. 4500 95-100 10 3.5 - O.K. - - - 14 Slight leak. 4500 95-100 10 3.5 - Leaking badly. Total times 13.0 59 * The position of the supply tank provided a constant head of 3 ft. Hs{Lord Ernest Hives - Chair}/W.Bell. | ||