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).
Graph of heating and cooling curves for a KLG 850 A plug after a 650-mile test run.
| Identifier | ExFiles\Box 162\4\ img171 | |
| Date | 29th August 1936 guessed | |
| (2) KLG 850 A HEATING COOLING PLUG RUN FOR 650 MILES IN B-23-AE TEMPRE °C | ||