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).
Graph comparing the performance of Champion L88 and K.L.G. FLB30X spark plugs under various running conditions.
| Identifier | ExFiles\Box 162\1\ img044 | |
| Date | 19th September 1938 | |
| COMPARISON TESTS OF CHAMPION L88 AND K.L.G. FLB30X PLUGS. TESTS PERFORMED ON CHASSIS 3BIV. No. 6 CYL. BEING USED THROUGHOUT. CHAMPION L88 CURVES SHOWN THUS ---- K.L.G. FLB30X --- MAX VOLTAGE ACROSS POINTS (K.V.) PLUG GAP .020 .025 .030 .035 .040 2.0 4.0 6.0 8.0 10.0 12.0 PICK-UP SLOW RUNNING HIGH SPEED T.R.T./183 19-9-38 | ||