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).
Report discussing the testing and development of dynamos with wavewinding and trembler control.
| Identifier | ExFiles\Box 68\4\ scan0205 | |
| Date | 22th March 1920 | |
| Contd. -3- R6/G22.3.20. which would form another helical layer, and permit of the coils being conveniently connected up as wavewinding. The dynamos would be tested with high resistance graphite carbon brushes, no low resistance copper Morganite brush. X.3560. It is intended to test these dynamos with trembler control, for which purpose the Bijur was given to re-wind suitable for 12 volt and 12 ampere circuit. We are expecting that the dynamo will cut in at less than 1650 (650) revs. (namely, 10 miles per hour) and have sufficient electromotive force to give the full amperes at very little above this speed, and its efficiency and internal losses shall be less than the Smith machine, and the current at the low speeds greater than the Smith machine at equal voltage. We cannot expect to excell in both these directions with less weight than the machines {of} the Self-regulating type, but if we are able to make, say, 10% or 15% improvement in both directions it may be worth while to use this system, especially as a larger current will be available when the batteries are in a low condition of charge. R.{Sir Henry Royce} | ||