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).
Use of a motor for starting the Condor aero engine, comparing it to a Lucas A.510 motor, detailing available parts, and mentioning a proposed test.
| Identifier | ExFiles\Box 34\3\ Scan161 | |
| Date | 12th April 1918 | |
| -2- Contd. EFC3/T12.4.18. on the battery in the long run, to use the motor connected up in this manner, because there would be more certainty of giving the engine a good pull round and starting the first time. As regards the starting of the aero engine, this motor connected up in this manner appears to be capable of doing nearly as much as the Lucas A.510 motor, as regards power, and this, with a slightly better efficiency and characteristic. Thus it would probably be capable of starting the Condor and might be experimentally applied to this engine. But of course there is considerably more weight in this motor. We have a fair amount of material in a half finished condition, from which we could make up several more of these motors, with only a moderate amount of work. We have at the moment two complete 45 slot armatures, two complete 24 slot armatures, and one complete 17 slot armature, in addition to those which are fitted on a chassis, not to mention field carcases, field coils, bearing brackets, (both com. end and pulley end) brush holders, brushes, etc. We are not quite clear whether Mr. Royce intended the twenty volt test to be carried out with the field coils all in series or two in series and two in parallel. We will endeavour to send Mr. Royce a copy of the curves early next week. EFC. | ||