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).
Outlining the inspection and reporting procedure for dynamos and starter motors.
| Identifier | ExFiles\Box 61b\3\ scan0083 | |
| Date | 27th September 1920 | |
| To L.F. from EFC. To. C.A.P y23 86027 EEC1/T27.9.20. X.294 - DYNAMOS. X.543.- STARTER MOTORS. A chassis dynamo or starter motor received by us for inspection and possible test should in the first instance, when instructed, be disassembled for examination and report. The report from you to myself should comprise :- (1) General remarks about the appearance, finish and construction of the complete machine and its various component parts, in which any particularly good or bad features of the design and construction are pointed out. (2) Weights. (a) Complete machine with pulley but without suspension. (b) Armature complete without pulley. (3) Air Gap. (4) (a) Number of wound poles. (b) Gauge of field wire if possible. (d) Arrangement of coils. (e) Resistance of field circuit (cold 18°C). (5) (a) Type of winding if determinable. (b) Number of slots. (f) Number of comm: bars. (j) Step of winding if determinable. (k) Armature resistance (cold 18°C). for which it should be stated exactly between what commutator segments this was taken. (l) Whether brushes are positioned off the neutral line to any extent. (6) (a) Commutator dia. (b) Commutator length. (c) Brush contact area. (d) Grade and hardness of brushes. If it be further instructed that the machine shall be dismantled, then the remainder of the particulars listed on our sheet of 11.6.20 shall be obtained. These latter will usually form the subject of a later report. EFC. | ||