Widowmaker is taking some short cuts calculating volume of a log.....:hmm3grin2orange:
His input data is diameter of log, 2ft, and length of log, 20ft....
From diameter the cross area (circular) is calculated...
A = d^2* PI/4 or A = radius^2*pi (radius^2=(d/2)^2=d^2/4)
Obviously he consider diameter an average diameter or a non tapered log....what ever....
In Widowmakers calculation 0.75 is either a rough estimate of PI/4 which is 0.785.....or his estimated wood volume in a stacked cord...(25% air)
His jump from 20ft to "16" in his calculation....,hmmm....16/20=0.75 too....
How ever...
Correct volume calculation with his input data should be....
A=2^2*PI/4=3.14sq ft
Volume=3.14*20=61.8cubft (solid wood, no air)
Which is not that far from his "non sense" way to calculate (64cubft)....LOL...."even a blind hen can find a grain".....hahaha...
a face cord is 4x8ft=32sqft....which is 1/3 full cord....
cutting this 20 ft log into 15 pieces (little less if losses in saw dust is calculated...LOL) of 16" logs will make 15*3.14sqft face...=47.1sqft (still no air counter for).....
47.1/32= just short of 1.5face cord (1.47).....still no air calculated...
with 25% air/75% wood...we will get 1.47/0.75=1.96 face cord=2/3 of a full cord....stacked with air....