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).
Overheating Smith's Dimmer Switch on the Bentley V instrument board, and a request for a rheostat for testing.
| Identifier | ExFiles\Box 168a\1\ img129 | |
| Date | 5th April 1939 | |
| 6135 To HPS{Horace Percy Smith - Experimental Factory Mgr}/WSC.{W. S. Cassel} from Rm{William Robotham - Chief Engineer}/RC.{R. Childs} c. By/RD. Rm{William Robotham - Chief Engineer}/RC.{R. Childs}5/WH.5.4.39. BENTLEY V - INSTRUMENT BOARD. We have found that the Smith's Dimmer Switch to DB.{Donald Bastow - Suspensions}2353 is not suitable for the above, as the element overheats under certain conditions. We have been asked to ascertain the suitability of the resistance unit used for the heater motor. Will you please obtain as soon as possible, one rheostat to DB.{Donald Bastow - Suspensions}2400 2354 for laboratory test. Very urgent. Rm{William Robotham - Chief Engineer}/RC.{R. Childs} Surtel received 12/5/39 R-jar. | ||