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 table for Bleriot Phi cutouts under cold operating conditions.
| Identifier | ExFiles\Box 48\3\ Scan292 | |
| Date | 4th January 1921 | |
| X. 4215. X.4215. BLERIOT PHI CUTOUTS (COLD) Battery disconnected. Battery connected. [TABLE START] Remarks. | Cut-out number. | Cold operation. Volts. (12.2-12.8) | Amperes before. (.20) | Amperes after. | Cold de-operation. Volts. | Amperes before. | Amperes after. (.20) | Cold deoperation. Volts. | Shunt amps. | Reverse series amps. | Remarks. --- R&S light-ing set | 1 | 12.4 | .190 | .115 | 10.2 | .095 | .155 | 11.9 | .110 | 2.6 | As received. | 1 | 12.5 | .195 | .105 | 12.3 | .098 | .195 | 12.2 | .098 | 1.1 | With additional resistance. 6EX. | 2 | 13.1 | .184 | .115 | 12.2 | .098 | .161 | 12.4 | .102 | .45 | As received. 2EX | 3 | 12.8 | .158 | .098 | 12.1 | .092 | .148 | 12.25 | .094 | -.1 | After adjustment by us. Same cut-out | 37884 | 12.65 | .155 | .097 | 11.8 | .090 | .143 | 12.2 | .091 | .2 | " EP {G. Eric Platford - Chief Quality Engineer} 's test car. Black | 3 24685 | | | | | | | | | | Pass for 5EX. | 38656 | 12.5 | .170 | .105 | 12.0 | .102 | .162 | 12.4 | .105 | .7 | " " Typ/Church | 3 38657 | Vibrates at cutting in point at maker's setting. Pass Chassis | 38658 | 12.3 | .175 | .105 | 11.7 | .100 | .165 | 12.3 | .105 | .5 | R.R. Adj. [TABLE END] 4.1.21. [Left Margin Text]: N.R. 523, 10-1-20. O. {Mr Oldham} & S. Ltd. 5267 | ||