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).
High and low-speed sparking characteristics and contact breaker performance.
| Identifier | ExFiles\Box 48\2\ Scan079 | |
| Date | 21th March 1924 guessed | |
| -5- Contd. (15) High speed sparking characteristics :- 1 Max regular sparking gap for all high speeds (a) 9.1 mm (b) 10.1 mm (c) 10.8 mm 2 Short-circuiting one gap extinguishes spark immediately following for:- (a) at 2600 R.P.M (b) at 3,500 R.P.M (c) Sparks not affected at retard 3 Sparks appear quite equal. (16) Low speed sparking characteristics :- Speeds :- (a) 150 R.P.M (b) 200 R.P.M (c) 280 R.P.M (17) Flinging of contact breaker at high speed :- Contd. | ||