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 of smoothness curves for a turbulent high power head, plotting flame travel against flame volume and volume/travel increase ratio.
| Identifier | ExFiles\Box 133\1\ scan0082 | |
| Date | 11th July 1926 guessed | |
| HIGH POWER HEAD FIG. I SMOOTHNESS CURVES FOR TURBULENT HIGH POWER HEAD PLUG POSITION: IMMEDIATELY OVER EXHAUST VALVE VERTICAL AXIS 1: RATIO % VOLUME INCREASE / % TRAVEL INCREASE VERTICAL AXIS 2: % FLAME VOLUME HORIZONTAL AXIS: % FLAME TRAVEL REFERENCE: J.L.E. / H.{Arthur M. Hanbury - Head Complaints} 736 | ||