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, pricing, and testing of Lucas, C.A.V., and Rotax dynamos.
| Identifier | WestWitteringFiles\H\November1921\ Scan21 | |
| Date | 11th November 1921 | |
| R.R. 235A (50 T)(S H.{Arthur M. Hanbury - Head Complaints} 986, 19-2-21) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 3008 - 2 - EFC2/T11.11.21. Contd. measuring the area, about 26 1/2 m.p.h., so that where the majority of the running is below this last speed, the Lucas curve might have the advantage and particularly so if the majority of the running is below 20 m.p.h. We are therefore not at all sure that the Lucas performance should not be considered the better, doing much less damage to the battery by overcharging at high touring speeds. With regard to the performance of the Lucas E.S.R.R. machine with Lucas control, this did not get very hot at makers setting and we might have increased the performance curve for this a little by advancing the control brush and still keep within our limit of temperature at maximum output. With regard to the prices of these dynamos, either Lucas machine has been quoted as £8.10.0 net, less coupling at driving end supplied by ourselves. The price of the C.A.V. machine is now similarly quoted as £ The price of the Rotax machine is £ Are there any special tests which you would care for us to carry out on the more favoured machines, viz. C.A.V. dynamo type DB{Donald Bastow - Suspensions}, and the Lucas E.S.R.R. (S.F.) dynamo ? Prices not yet available. EFC. | ||