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).
Table of chassis dynamo heating test results for various models and settings.
| Identifier | WestWitteringFiles\E\June1920\ Scan14 | |
| Date | 18th June 1920 | |
| R.R. 199 (250T) (SD676 19-7-17) MP180865 18.6.20. CHASSIS DYNAMO HEATING TEST RESULTS. (Maximum output) (Second lot). Dynamo. Maximum amp. output Start. Finish. Initial or ambient Temperature. Final Temp(oC) Thermom. Field Coil. Remarks. Lucas E.575. No.1341. 12.8 10.7 18 83 139 Makers setting. 15.2 12.9 14 83 150 Advanced control. Lucas C.575. 10.4 8.4 14 78 109 Makers setting. 14.1 10.35 20 93 120.5 Advanced control. Smith (T & M) 2D(2) 13.2 9.1 14 80 103 Makers setting. 15.3 11.2 14 85 123 Advanced control. Smith (T & M) 2d (2). 16.1 10.8 14 86 132 Fully advanced control. EEC. | ||