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).
Report discussing armature noise and performance improvements in experimental N.B. machines.
| Identifier | WestWitteringFiles\R\2October1927-November-1927\ 79 | |
| Date | 10th October 1927 guessed | |
| -2- Contd. noise trouble being cured in this case also. We have had practically no suggestion of armature noise from the experimental N.B. machines. At present it does not appear that it will be necessary to standardise 28 slot armatures for use in this type of machine. It will be recalled that the principal improvement in the N.B. machine as compared with the old standard is that of much less heating for the same output. We have in this machine a similar if not still better margin than in the case of the 20 H.P. machine, between the maximum permissible output curve and the representative curve. EFC. | ||