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 a primary circuit, including ampere-speed curves and sparking characteristics.
| Identifier | ExFiles\Box 40\2\ Scan070 | |
| Date | 17th December 1925 guessed | |
| -4- (10) Closed circuit primary ampere-speed curve. Speed. Amperes. Speed. Amperes. 100 1.03 1200 2.37 200 1.57 1600 2.40 300 1.92 2000 2.43 400 2.06 2400 2.45 600 2.23 2800 2.46 800 2.30 3200 2.46 1000 2.33 3400 _ _ _ _ _ _ _ _ _ _ (11) Utility tests. (a) 8.0 m.m. (b) 7.3 m.m. (c) 6.9 m.m. (d) 6.2 m.m. (11a) Speed range :- 560rpm to 3300 rpm (12) Maximum high speed sparking :- 4500rpm. (13) Low speed sparking characteristics Speeds :- (a) 60 rpm (b) 105 " (c) 240 " Contd. | ||