Intruder:
I appreciate your explaination, but what I don't understand is what occurs in the time period from 'no light' to ignition. If the high altitude region is less than optimum, in the extended time period that the AB is attempting to light, what actually happens/changes during this time for ignition to suddenly take place?
Machinbird:
When you mentioned turbine torching do you mean autoignition, or did the J-79 have secondary/backup method of AB ignition, the hot streak or hotshot technique?
boguing:
Unfortunately I can't remember the exact figures, but I think it was up to 8 seconds at 30 to 40 thousand feet.