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).
Re-test of a lengthened Lucas dynamo and advising against its use due to potential issues.
| Identifier | ExFiles\Box 36\4\ scan 243 | |
| Date | 9th November 1921 | |
| To EFC. from R c. to CJ. c. to Wor.{Arthur Wormald - General Works Manager} c. to By.{R.W. Bailey - Chief Engineer} X3014 l R12/09.11.21. X.4352. RE TEST OF LENGTHENED LUCAS DYNAMO. X.3014.b X.4211. Thank you for sending the photos referring to the Lucas dynamo test. To tell the truth I cannot make anything out of this test which is likely to be useful. Originally I merely suggested that the increased length of the machine might cause trouble through deflection vibration of the shaft. I understand at the moment we are not proposing to order any of these machines, and this is supported by my experience with the risk of overcharging if the amperes are too great, resulting in overcharging and loss of electrolite as has occurred on 6-EX. You will therefore understand that my impression is that providing the present standard dynamos are correctly fitted up as regards a satisfactory belt drive and reliably working automatic switch and fuse, the trouble of the under-charging of the battery should be only occasionally met with, and might possibly be better dealt with by having garage connections than by the use of a larger, heavier and slightly more doubtful dynamo. R.{Sir Henry Royce} | ||