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 showing ampere-speed curve, utility tests, speed range and sparking characteristics for a component.
| Identifier | ExFiles\Box 48\2\ Scan259 | |
| Date | 26th March 1925 guessed | |
| -4- (10) Closed circuit primary ampere-speed curve. Speed. Amperes. Speed. Amperes. 100 .75 1200 3.00 200 1.30 1600 3.20 300 1.72 2000 3.22 400 2.00 2400 3.32 600 2.35 2800 3.35 800 2.66 3200 3.38 1000 2.90 3400 3.40 (11) Utility tests. (a) 8.5 m.m (b) 7.9 m.m (c) 7.7 m.m (d) 5.4 m.m (11a) Speed range :- 360 r.p.m to 2,200r.p.m. in the retarded position only, irregular at all speeds advanced. (12) Maximum high speed sparking :- 3100 r.p.m. (13) Low speed sparking characteristics Speeds :- (a) 185 r.p.m. (b) 145 r.p.m. (c) 125 r.p.m. Contd. | ||