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).
Results of test bed trials on engine suppressors and their durability.
| Identifier | ExFiles\Box 155\2\ scan0205 | |
| Date | 3rd March 1938 | |
| To By/RD. from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} c. Rm{William Robotham - Chief Engineer}/RC.{R. Childs} 1315 Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}4/MH.{M. Huckerby}3.3.38. From the attached report of the test bed it will be seen that under normal conditions there is no detrimental effect on the running of the engine when using the suppressors. Only under non standard conditions do the suppressors show up by occasional misfires. We are retaining them on our test bed unit in order to test out their durability, at the same time we understand that one of the experimental cars has them fitted. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||