Quick Answer
Fatwood has a high caloric value for burning due to its high density of volatile compounds, particularly terpenes, that release energy when combusted. This high energy density makes it an efficient fire starter and heat source.
Composition and Properties of Fatwood
Fatwood is a type of wood that is rich in sap and resin, usually obtained from the heart of pine or fir trees. It contains a high concentration of volatile organic compounds (VOCs) such as terpenes, which are responsible for its high caloric value. These VOCs are released as gases when fatwood is heated, producing a high-energy flame. The high density of fatwood, typically between 0.8-1.2 g/cm³, also contributes to its efficient combustion.
Identification and Harvesting of Fatwood
To identify fatwood, look for small, knotty pieces of wood with a distinctive pine or fir scent. Fatwood is often found in the center of logs or branches, where the sap has accumulated. When searching for fatwood, avoid damaging the surrounding wood, as this can release sap and reduce the effectiveness of the fatwood. Harvesting fatwood requires a saw or axe, and it’s essential to dry the pieces thoroughly to prevent rot and mold growth. A well-dried piece of fatwood can be stored for up to a year without significant degradation.
Preparing and Using Fatwood for Fire Starting
To use fatwood for fire starting, shave small shavings or splinters from the fatwood, taking care not to damage the surrounding wood. The shavings or splinters should be dry and free of sap, as this can create a smoky fire. When igniting the fatwood, use a match, lighter, or bow drill, and focus on the center of the piece to maximize the release of VOCs. The high-energy flame produced by fatwood can be used to start larger fires or as a heat source in survival situations.
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