Difference between revisions of "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 | ||
Latest revision as of 16:14, 16 November 2012
garden15 ; chicken15; tractor ; housework12; goat12 ; water_filter12 ; expansion12 ; sunroom12 ; landscape12 ; lumber12 ; garden14 ; garden12 ; chicken12 ; [1]
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
