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 results for an electrical component, detailing ampere-speed curves and sparking characteristics.
| Identifier | ExFiles\Box 40\2\ Scan198 | |
| Date | 1st June 1927 guessed | |
| -4- Contd. (10) Closed circuit primary ampere-speed curve. Speed. Amperes. Speed. Amperes. 100 .77 2000 2.45 200 1.24 2400 2.47 300 1.60 2800 2.48 400 1.86 3200 2.49 600 2.10 3400. 2.50. 800 2.25 1200 2.34 1600 2.42 (11) Utility tests. (a) (b) not taken (c) (d) (11a) Speed range :- 900 to 4000 rpm - central position 500 to 4000 rpm - retard " Will not spark at all at advance " (12) Maximum high speed sparking :- over 4000 rpm. (13) Low speed sparking characteristics. Speed :- (a) 115 rpm (b) 170 rpm (c) 205 rpm Contd. | ||