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).
Instructions detailing the particulars of the 'G' motor, specifically how it differs from the 'C' machine in its armature and field circuit.
| Identifier | ExFiles\Box 64\1\ scan0210 | |
| Date | 1st July 1925 | |
| RR 238 (150 BKS.) (SH57. 29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.F.C. Order No.: PC. 97 Customer's No.: X 8620 E.A.C. S Motor G The following are particulars of the fourth motor which has been made up for us and which is designated G.{Mr Griffiths - Chief Accountant / Mr Gnapp} Armature. This differs from that of C machine only in respect of the armature winding which is of smaller C S area with a reduction in the depth of slot to I 70831. The resistance is .01037 w at 20.5°C. i.e. .0102 w at 19°C Field Circuit. This is carried out to I. 70954, and differs from C machine only in the size of the pole pieces and number of turns on the teazer winding. The pole pieces are those given in EFC S/T15-9-24. and 15-1-25. (Reduced Section) The teazer winding is of 36 turns per pole of 17 SWG wire. Resistance of teazer winding is .386 w at 23°C. i.e. .380 w at 19°C contd. Signed This Sheet must be filed on completion of the work. | ||