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).
Test results for a motor and generator with specifications for their armatures and field coils.
| Identifier | ExFiles\Box 34\3\ Scan094 | |
| Date | 15th February 1916 | |
| R.R. 255 a (400 T) (S.C. 538. 15-2-16) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1546. C O P Y. In this test motor had 45 Slot wave wound armature and Generator had 17 Slot three coils per Slot wave wound armature, both machines had Standard field coils and were separately excited. direct drive. MOTOR GENERATOR. Field Excitation. Armature amps. volts. E+M+F+ Field Excitation. Speed. 27 23 12 8 25 3000 26 25 12 9 30 3000 25 28 11.5 10 35 3000 25 30 11.5 11 40 3000 24 32 11 12 45 3000 23 34 11 12.5 50 3000 22 36 11 13 55 3000 22 38 11 13.5 60 3000 22 40 11 14 65 3000 22 42 10.5 14.5 70 3000 __ __ ____ ____ __ ____ | ||