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).
Performance table comparing different component types, their fixing methods, maximum operating temperatures, and remarks on misfires.
| Identifier | ExFiles\Box 164\5\ img393 | |
| Date | 25th August 1938 | |
| -2- Rm{William Robotham - Chief Engineer}/WB.{Mr Brazier/Mr Bell}1/JH.25.8.38. TYPE. FIXING. MAX. TEMP. REMARK. Lucas Crankcase 106°C. No misfires under any Sports. without heat conditions. resisting washers. Lucas Crankcase 110°C. No misfires. Sports. with heat resisting washers. Delco Crankcase 184°C. Misfired as heat of coil 19A. with heat approached maximum. resisting washers. Delco Crankcase 179°C. Misfired as heat of coil 19A. without heat approached maximum. resisting washers. Delco On frame. 136°C. Misfired as heat of coil 19A. approached maximum. R.R. N.18 Crankcase. 124°C. (GLOWRAY BALLAST) 20,000 No misfires. turn. R.R. 1.M.3. Crankcase 156°C. No misfires. (R.R.Delco) metalcase. R.R.P.III Crankcase 102°C. (Glowray ballast) D.73260 No misfires. R.R.P.III. 112°C. Nickelballast D.73260. No misfires. | ||