Rolls-Royce Archives
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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).
Oscillograph work for the Wraith ignition system.

Identifier  ExFiles\Box 168\3\  img148
Date  19th April 1939
  
R.R. 30M. ST.{Capt. P. R. Strong} 74907/4/11/38 C.E.
6119
EXPERIMENTAL DEPARTMENT REPORT.
REFERENCE:- Lr{Mr Ellor}/HWS/SQL.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/SQL.
Copies of Report Circulated to:- Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}/Ro.{C. C. Rose - Export Manager} 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/SQL. Test No. Date:-
  
  


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