Departmental memo detailing specifications for an armature shaft assembly and its electrical components.
| Identifier | ExFiles\Box 76\2\ scan0013 | |
| Date | 19th June 1911 | |
| R.R. 348A (100 H) (W 387. 4.4.11) E.P. 8817. DEPARTMENTAL MEMO. Issued 19th June 1911 This column is for Name of Person addressed. DATE. (3) spiders at each end to carry the armature shaft, preferably in ball bearing; the external portions of the centre of the spiders being turned to receive a journal type of ball bearing. The diameter of these latter, which we should supply, can * be kept down by making the centres wider than the centres of the ball bearings carrying the armature. The whole of the foregoing can be easily explained by means of a sketch or diagrammatic drawing, so as not to frighten the makers. The voltage I should use for the sake of the carbon brushes would be 200 volts at 1000 revs. and 400 volts at 2000 revs. The field magnets would be separately excited so that there would be no need for anxiety as to the stability This sheet must be filed with the correspondence to which it refers. | ||
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).