Simms, D.L., 1962. ON THE PILOT IGNITION OF WOOD BY RADIATION. Fire Research Notes 496
Results on the pilot ignition of wood by radiation may be correlated using simple heat transfer theory from a different effective threshold surface temperature for each different position of the pilot flame. The correlations are not complete because a small variation between densities remains and the behaviour of fibre insulation board is anomalous, probably because self-heating is significant under some experimental conditions.