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).
Modifications and experiments for the Phantom II dynamo and two-rate charge scheme.
| Identifier | ExFiles\Box 163\6\ img117 | |
| Date | 1st January 1931 | |
| Sg.{Arthur F. Sidgreaves - MD} from EFC. c. Ry. c. Wor.{Arthur Wormald - General Works Manager} PN.{Mr Northey} X6016 EFC2/AD3.1.31. X.6016. PHANTOM II DYNAMO AND TWO-RATE CHARGE SCHEME. Discussing the matter of the two-rate charge scheme with E.{Mr Elliott - Chief Engineer} and PN.{Mr Northey} yesterday, the following points were arrived at :- (1) For immediate production purposes it was decided that the provision of full charge in the S & T position of the lamp switch should be made. This is effected by a comparatively simple modification. There seems no reason against this and every reason in favour of it. It is possible that the modification will just make the difference between being able to keep up the battery in winter Town running conditions and not. For use with this arrangement the lowest field resistance (namely 6") is approved. For further experimental work we have the following: (2) The 3/4" longer 48 coil dynamo which is to be instructed experimentally. (3) The 56 coil 17 S.W.G. armature mentioned in our EFC1/AD3.1.31 which also is being instructed experimentally. (4) Use of commutator solder of higher melting point enabling the output setting of the dynamo to be increased by 1 to 2 amperes without the machine being affected by temperature rise. (5) The provision of some form of forced ventilation for the dynamo. EFC. | ||