Detailed results of the measurements made by the United Kingdom team at the
Project Flambeau test fire 760-12-67 are presented and discussed. The damage to
standardised wood blocks increased from the edges of the array to a maximum about
midway between the centre and the north-east corner, broadly the region where
fire whirls were observed. This increase may well be due to changes in
convective heat transfer over the array. Systematic differences in the damage
sustained were found between blocks exposed at various positions, facing in
various directions; these largely corresponded to differences in the
configuration factor of the fuel pile with respect to the block. Peak wind
speeds of more than 60 ft/s were registered at ground level within the array
by simple 'turn-over' wind gauges. Peak temperatures in the streets exceeded
200C.
