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).
Instructions detailing a test on a battery ignition system with an additional standard ballast in series.
| Identifier | ExFiles\Box 54\3\ Scan261 | |
| Date | 20th June 1925 | |
| RR 238 (180 BKS) (SHST. 29-6-20.) MP 224388 X. 4645 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.Y.B. Date: 20-6-1925 Order No. WB{Mr Brazier/Mr Bell} 23 Customer's No. X 4645 Standard Battery ignition with additional standard ballast in series. Performance on standard leaky gap. Make Ratio: .5 Supply Volts: 12 The maximum speed of the distributor to allow regular sparking on the annular gap, under the above conditions, was observed to be 600 rpm. As in WB{Mr Brazier/Mr Bell}17, this could only be obtained with the direction of the primary current reversed. With normal polarity regular sparking could not be obtained. Signed: H.E.W. This Sheet must be filed on completion of the work. | ||