Lumber12

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The pine tree:

• 3 feet from base, 70 in circumference = 22.3" = 28.3 cm radius
• 6 feet from base, 64 in circumference = 20.4" = 25.9 cm radius
• height : 45 deg hypo is 28 paces (of 3.3 feet) = 92 feet = 28 meters
• volumn : V = 1/3 pi r^2 h = 2.3 m^3
• 1 m^3 = 35.3 ft^3. Wood ~33 lb/ft^3 = 530kg/m^3
• total tree mass = 1219 kg = 2680 lbs
• http://nrs.fs.fed.us/pubs/rp/rp_nc096.pdf
• cone inertia = 3/5m(r^2/4 + h^2) = m/20 * (3r^2 + 3*4h^2)
• rod inertia = m/3*l^2