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).
Specifications for platinum point gap, contact breaker timing, and armature core flux.
| Identifier | ExFiles\Box 49\5\ Scan224 | |
| Date | 8th March 1921 | |
| R.R. 255A. (100 T) R.H. 798. 10-12-20. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2947 (7). Contd. (2Eb) Platinum point gap :- .012" Contact breaker timing :- Make. Break. Retarded. Advanced. A.{Mr Adams} -55° +104° Make. 160° 126° R -20.5 139° Break. 319° 284° Make. 339° 304° Break. 139° +104° Make ratio :- .885. (23) Armature core flux Speed. Flux. 400 800 1200 1600 2000 2400 2800 ____ ____ 8.3.21. [Watermark text] DICKINSON BOND 1804 MADE AT CROXLEY | ||