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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).
Test results log for tall ignition coils, detailing performance metrics.

Identifier  ExFiles\Box 69\1\  scan0025
Date  17th June 1925
  
V8710
X.3604cl.
R.R. TALL IGNITION COILS.
X.4596. X.871D. X.4655.

| Date. | Coil number. | Secondary continuity. | Secondary Milliamps. | O.C.S. Test. | Running current (amps). | Remarks. |
|---|---|---|---|---|---|---|
| | | | 18.0 | 1.25 | .78 to .92 | |
| 19.1.25. | EAC D.{John DeLooze - Company Secretary} | O.K. | 16.6 | 1.20 | .87 | O.K. |
| 29.1.25. | TR{Capt. F. W. Turner - Finance}3 | O.K. | 14.1 | 1.26 | .92 | O.K. |
| 29.1.25. | EAC. E.{Mr Elliott - Chief Engineer} | O.K. | 16.7 | 1.25 | .90 | O.K. |
| 2911.25. | EAC. F.{Mr Friese} | O.K. | 14.5 | 1.22 | .89 | O.K. |
| 25.3.25. | TN2 | O.K. | 14.4 | 1.14 | .81 | O.K. |
| 8.6.25. | PR1 | O.K. | 17.0 | 1.17 | .85 | O.K. |
| 8.6.25. | PR2 | O.K. | 16.6 | 1.18 | .85 | O.K. |
| 8.6.25. | PR3 | O.K. | 17.0 | 1.17 | .85 | O.K. |
| 8.6.25. | LS1 | O.K. | 18.2 | 1.09 | .78 | Secy. m.a. rather high and primy current low. |
| 17.6.25. | | | | | | |
  
  


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