10'^ 2 5 10'' 2 5 10° 2 5 10 



Flame depth or diameter (ft.) 



Figure 6. — Burning regimes of various fuels based on cold vapor density and viscosity . 



Figure 7, — Comparison of 

 experimental rates of 

 spread, to fheoretical 

 curve of fire spread 

 showing end points for 

 fuel moisture content. 



o 



Q. 



'o 



O 



• Ponderosa pine 

 □ White pine 

 <^ Lodgepole pine 



2 



8 10 12 



14 16 18 20 22 24 26 28 30 



14 



Fuel moisture content (percent) 



