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).
Query regarding test results for a vibrator control dynamo, specifically concerning temperature rise and current output limits.
| Identifier | ExFiles\Box 60\3\ Scan230 | |
| Date | 24th May 1933 | |
| S/W. Hs{Lord Ernest Hives - Chair}/Wst. Copy to Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} WST 86092 PN.{Mr Northey}6/WT24.5.33. Vibrator Control Dynamo for 40/50 H.P. and Bentley. Referring to your Hs{Lord Ernest Hives - Chair}/Wst2/MA22.5.33 I conclude this test referred to your record one of the dynamo only and not of the system. It would be interesting to know what was the rise of temperature during this test. I conclude the rate of output was a constant one i.e 12 amperes at 13 volts. Do you anticipate that in practice the dynamo would not be called upon to run at a higher current output than 12 amperes with this vibrator system of control, or alternatively in the event of 60 watt headlamps being used would the temperature of the dynamo be raised dangerously high ? PN.{Mr Northey} | ||