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).
Page 4 of a test report detailing a closed circuit primary ampere-speed curve and sparking characteristics.
| Identifier | ExFiles\Box 57\2\ Scan160 | |
| Date | 23th December 1926 guessed | |
| -4- Contd. (10) Closed circuit primary ampere-speed curve. Speed. Amperes. Speed. Amperes. 100 .92 2000 2.47 200 1.32 2400 2.50 300 1.62 2800 2.51 400 1.88 3200 2.515 800 2.11 3400 2.52 1200 2.40 1600 2.42 (11) Utility tests. (a) (b) not taken (c) (d) (11a) Speed range :- 1150 to 1800 rpm - any position 500 to 4000 rpm - central " (12) Maximum high speed sparking :- 4500 r.p.m. (13) Low speed sparking characteristics. Speed :- (a) 210 rpm. (b) 175 rpm. (c) 140 rpm. [A handwritten note on the right with a large bracket covering items (12) and (13) reads: "4.5 mm gaps."] Contd. | ||