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 detailing secondary milliamps, primary point gap, and contact breaker timing results.
| Identifier | ExFiles\Box 40\2\ Scan099 | |
| Date | 29th March 1926 guessed | |
| -5- (14) Secondary milliamps :- Maximum :- 13.2 16.9 Minimum :- 4.2 (15) Primary point gap after previous tests :- Average = .015" Primary point gap .011" Contact Breaker Timing. | | Make | Break | |-------|---------|---------| | A | -15° | 98° | | R | 43° | 156° | | | Retard. | Advance. | |-------|---------|----------| | Make | 44° | -14° | | Break | 156° | 98° | | Make | 222° | 164° | | Break | 336° | 278° | Make ratio :- .628 Primary point gap:- .019" Contact breaker timing. | | Make. | Break. | |-------|---------|---------| | A | -11° | 93° | | R | 47° | 151° | | | Retard. | Advance. | |--------|---------|----------| | Make. | 48° | -10° | | Break. | 152° | 94° | | Make. | 226° | 168° | | Break. | 330° | 272° | Make ratio:- .578° Average variation from normal = 2 1/2° | ||