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).
Test report detailing primary ampere-speed curve data and spark characteristics at various speeds.
| Identifier | ExFiles\Box 43\4\ Scan131 | |
| Date | 19th July 1928 guessed | |
| -4- (10) Closed circuit primary ampere-speed curve. Speed. Amperes. Speed. Amperes. 100 1.03 2000 1.59 200 1.25 2400 1.59 300 1.33 2800 1.59 400 1.37 3200 1.58 600 1.42 3600 1.57 800 1.47 1200 1.54 1600 1.57 (11) Utility test speed range :- Only occasional sparks fully advanced. Sparks OK from 2000 to 5000 rpm. Central. No sparks at all fully retarded. (12) Maximum high speed sparking :- over 5500 rpm. (13) Low speed sparking characteristics. Speed :- (a) 110 rpm (b) 140 " (c) 195 " Contd. | ||