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 including a closed circuit primary ampere-speed curve and sparking characteristics.
| Identifier | ExFiles\Box 65\3\ scan0166 | |
| Date | 18th January 1928 guessed | |
| -4- (10) Closed circuit primary ampere-speed curve. Speed. Amperes. Speed. Amperes. 100 .77 2000 2.96 200 1.38 2400 2.98 300 1.85 2800 3.00 400 2.15 3200 3.02 600 2.47 3600 3.04 800 2.66 1200 2.83 1600 2.98 (11) Utility test speed range :- 350 to 800 rpm any position 10° from advance OK up to 2300 rpm Full advance irregular except at low speeds. (12) Maximum high speed sparking :- OK at 4500 rpm (13) Low speed sparking characteristics. Speed :- (a) 55 rpm (b) 100 rpm (c) 130 rpm Contd. | ||