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 {E. Fowler Clarke - Electrical Engineer} 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. | ||
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).