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 report on high and low speed sparking characteristics, and contact breaker performance.
| Identifier | ExFiles\Box 49\5\ Scan167 | |
| Date | 19th July 1922 guessed | |
| -5- Contd. (15) High speed sparking characteristics:- 1 Max regular sparking gaps for all speeds over 1500 r.p.m. (a) 5.3 m.m. (b) 6.5 m.m. (c) 7.75 m.m. 2 Each gap shorted in turn while varying the speed. (a) Sparks following shorted gaps slightly affected at 3400 r.p.m. (b) Sparks unaffected. (c) " " 3 Sparks from both sides appear equal. (16) Low speed sparking characteristics:- Speeds:- (a) 67 r.p.m. (b) 68 r.p.m. (c) 69 r.p.m. (17) Flinging of contact breaker at high speed:- Contd. | ||