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).
Request to ascertain the attractive force between the armature and pole piece of a dynamo and motor.
| Identifier | ExFiles\Box 35\1\ scan 182 | |
| Date | 11th October 1921 | |
| X2713 To EFC. from R.{Sir Henry Royce} c. to CJ. R3/G11.10.21. X.294 - RE DYNAMOS. X.2713. Kindly ascertain for me the attractive force between an armature and the pole piece of a dynamo and motor per square c.m. of surface for various densities about what we naturally use, namely B = 5,000 to 7,500 lines per square c.m. R.{Sir Henry Royce} | ||