Comparative test for by-pass filters for Chassis No. B.139-BL.
| Identifier | ExFiles\Box 135\3\ scan0250 | |
| Date | 10th March 1938 | |
| 1139. W/K. Pk. from Rm. {William Robotham - Chief Engineer} Rm {William Robotham - Chief Engineer} 7/R.10.3.38. Chassis No. B.139-BL. Thank you for your Pk/9.3.38. If the Car Mart are prepared to submit one of these filters to us for test, we will give them a report on it. We have arranged a comparative test for by-pass filters of this type, and have already got figures from several. Rm. {William Robotham - Chief Engineer} | ||
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).