Equations 6 and 7 can be used by investigators to
compare predicted versus observed flame lengths. For
example, Sando (see footnote 3) found that predicted
flame lengths using Byram's (1959) Eqs. 3.3 and 3.4
agreed well with flame lengths observed on the six fires
referred to earlier. They will, however, underpredict
flame lengths for crown fires. This can be corrected by
adding one-half of the mean canopy height (Byram
1959).