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).
Description of combustion chamber design and its effect on controlling detonation waves.
| Identifier | ExFiles\Box 147\2\ scan0181 | |
| Date | 21th December 1939 guessed | |
| unless these two particles are close to the adjacent edges of each of these two masses of gas and lie immediately above and immediately below the space between the walls of the said protuberance and the walls of the combustion chamber. The effect of this as I believe is that any detonation wave which is generated at top dead centre in the combustion chamber is confined to the combustion chamber and will not affect the gases between the projecting portions of the cylinder head and the top of the piston. Owing to the fact that the walls of the combustion chamber and of the protuberance are parallel with each other and with the axis of the cylinder, the masking effect is maintained during the initial movement of the piston away from top dead centre until the protuberance has moved out of the combustion chamber. In the example shown in Figures 3 and 4 the combustion chamber E does not lie wholly above the crown of the piston but a portion in which operates the exhaust valve E¹ lies to one side of the cylinder. The inlet valve is shown at E² and the ignition plug at E³. The combustion 6. | ||