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).
Experimental department report on oscillograph work on the Wraith ignition system, comparing various distributors.
| Identifier | ExFiles\Box 164\5\ img418 | |
| Date | 19th April 1939 | |
| R.R. 306. ST.{Capt. P. R. Strong} 74907/4/11/38. C.E. 6119 EXPERIMENTAL DEPARTMENT REPORT. REFERENCE:— Lr{Mr Ellor}/HWS/SGL.7/WJ.19.4.39. Subject of Report:— OSCILLOGRAPH WORK ON WRAITH IGNITION. General Conclusion:— Oscillograph records have been taken in order to make a comparison between the Rolls-Royce and Delco-Remy distributors, and an experimental distributor with a commutator type contact breaker. There is little difference in the secondary current and voltage for the Rolls-Royce and Delco distributors. There is a sign of a slightly irregular break on one of the records with the R.R. distributor at 650 RPM. This may be the cause of occasional misfiring, as it would produce a loss of spark energy. The commutator distributor gave a very poor break, which would result in a low spark energy. ------------ Lr{Mr Ellor}/HWS/SGL. Copies of Report Circulated to:— Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}/Re. By.{R.W. Bailey - Chief Engineer} Report to be noted for further action by:— Test carried out on:— Electrical Laboratory. By:— Lr{Mr Ellor}/HWS/SGL. Test No. Date:— LR{Mr Ellor} | ||