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).
Performance graph showing the output speed curves for a 40/50 HP S.S. Dynamo with pole piece modification for high output.
| Identifier | ExFiles\Box 163\6\ img052 | |
| Date | 11th October 1930 guessed | |
| OUTPUT SPEED PERFORMANCE CURVES OF 48 COIL, 40/50. DYNAMO WITH POLE PIECE MODIFICATION FOR HIGH OUTPUT. SPECIFIED CURRENT OR OUTPUT REQUIREMENTS FOR 40/50 H.P. S.S. DYNAMO. (I) With no output reducing resistance. (II) With output reducing resistance in field circuit. (III) With output reducing resistance in armature circuit. (positive brush lead). NB. In case III the useful watts on peak output (i.e. 230) plus the watts lost in resistance (i.e. 90) are equal to the full maximum output watts (i.e. 320) in case I. AXIS LABELS: AMPERE OUTPUT. OPERATING VOLTAGES. DYNAMO R.P.M. | ||