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).
Visual comparison of by-pass filter performance using blotter spot tests over time.
| Identifier | ExFiles\Box 135\3\ scan0264 | |
| Date | 6th April 1938 guessed | |
| 1139 ① GENERAL SAMPLE N°1 58% GENERAL SAMPLE N°2 63% GENERAL SAMPLE N°3 66% GENERAL SAMPLE N°4 74% GENERAL SAMPLE N°5 78% GENERAL SAMPLE N°6 85% GENERAL SAMPLE N°7 86% GENERAL SAMPLE N°8 86% GENERAL SAMPLE N°9 86% ①A "GENERAL" 2ND SAMPLE N°1. 27% "GENERAL" 2ND SAMPLE N°2 1HR. 34% "GENERAL" 2ND SAMPLE N°3 2HRS. 42% "GENERAL" 2ND SAMPLE N°4 3HRS. 46% "GENERAL" 2ND SAMPLE N°5 4HRS. 51% "GENERAL" 2ND SAMPLE N°6 7HRS. 60% "GENERAL" 2ND SAMPLE N°7 10HRS. 68% "GENERAL" 2ND SAMPLE N°8 12HRS. 70% "GENERAL" 2ND SAMPLE N°9 14HRS. 72% SMITH'S SAMPLE N°1 BEFORE TEST 44% SMITH'S SAMPLE N°2 1HR. 72% SMITH'S SAMPLE N°3 2HRS. 69% SMITH'S SAMPLE N°4 3HRS. 79% SMITH'S SAMPLE N°5 4HRS. 79% SMITH'S SAMPLE N°6 6HRS. 79% SMITH'S SAMPLE N°7 6HRS. 80% SMITH'S SAMPLE N°8 80% ③ "AC" SAMPLE N°1 48% "AC" SAMPLE N°2 1HR. 56% "AC" SAMPLE N°3 2HRS. 64% "AC" SAMPLE N°4 3HRS. 69% "AC" SAMPLE N°5 4HRS. 72% "AC" SAMPLE N°6 7HRS. 79% "AC" SAMPLE N°7 10HRS. 83% "AC" SAMPLE N°8 12HRS. 83% "AC" SAMPLE N°9 14HRS. 84% "LUBER-FINER" SAMPLE N°1 47% "LUBER-FINER" SAMPLE N°2 1HR. 55% "LUBER-FINER" SAMPLE N°3 2HRS. 55% "LUBER-FINER" SAMPLE N°4 3HRS. 56% "LUBER-FINER" SAMPLE N°5 4HRS. 62% ③A A.C. 2ND SAMPLE N°1 23% A.C. 2ND SAMPLE N°2 1HR. 32% A.C. 2ND SAMPLE N°3 2HRS. 35% A.C. 2ND SAMPLE N°4 3HRS. 41% A.C. 2ND SAMPLE N°5 4HRS. 44% A.C. 2ND SAMPLE N°6 7HRS. 47% A.C. 2ND SAMPLE N°7 10HRS. 47% A.C. 2ND SAMPLE N°8 12HRS. 47% "A.C." 2ND SAMPLE N°9 14HRS. 48% ④ SMITH'S SAMPLE N°1 47% SMITH'S SAMPLE N°2 1HR. 60% SMITH'S SAMPLE N°3 2HRS. 70% SMITH'S SAMPLE N°4 78% COMPARISON OF BY-PASS FILTERS | ||