Figure 5. — A cross-sectional view of isothermal surfaces within the transverse member 



of the unit cell at ignition. Surfaces are parallel to the average combustion zone 

 front. Each member is identified bu test number for reference to table 1. 

 6 = 0.08. 



FIRE VECTOR 



4 



Figure 6. --An averaged cross-sectional view of isothermal surfaces within the longitu- 

 dinal number of the unit cell at ignition. Surfaces are parallel to the average 

 combustion zone front. Each member is identified by test number for reference to 

 table 1. 3 = 0.08. 



12 



