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).
Test report from Montlhery track detailing lap performance data for a Lodge X.317 spark plug.
| Identifier | ExFiles\Box 1\4\ B001_X 100a-page131 | |
| Date | 8th December 1932 | |
| (4) TESTS ON MONTLHERY TRACK. 8.12.32. R.H.R.II. Type of Plug - Lodge X.317 LAPS. | MINS SECS. | M.P.H. | TEMP. | | | | AIR. | OIL | WATER. 1 | 1.27 | 65.5 | 4 | 98 | 75 2 | | | | 100 | 77 3 | 1.26 2/5 | 65.9 | | 102 | 77 4 | | | | 109 | 76 5 | 1.26 2/5 | 65.9 | 4 | 110 | 78 | ||