Yellowbird,
I've also only done it on the ground whilst at idle - took about 3 seconds. The "usual" drill is that, on receipt of the fire warning, the first thing for the pilot to do is to establish safe single engine flight condition which would reduce the torque load to well below 2 x 60%. On the system closing the LP cock, then engine will only run until the fuel between the LP cock and the injectors is used up at which point the "flame" goes out.
Thanks, I know all this...(as you know 2x 60%Tq results in 2'' OEI limit, which is considered a safe condition to establish a situation for yourself to manouvre yourself to a situation where it is safe to lower the collective to either OEI MCP, or, ofcourse, land safely
I just would like to know the FF figures for Ground idle (or Flight idle with ~12% tq) and Flight idle at 60%tq....I was hoping someone should be able to provide these figures.