Heavy Fuel 2 : Fuel of large mass and density, such as snags, logs, and large limb-wood, that ignites and is consumed more slowly than flash fuels. See: Coarse Fuel; See also: Flash Fuel.
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}