As I remember...dont do tanks very much these days, I got better results on hangers dropping 2 500lb per bomber on a hanger. seemed it was more efficient than 1 1000lb bomb per hanger. I hated the waste of 2 1000 per bomber, yes it works...but its a bit over kill when 2 500s would do it. BIG TIP..for hangers, MAKE SURE you are properly calibrated. For Towns it isnt as much an issue...Throttles to the wall and simple 5 second calibration= success, do that on any hanger= second drop usually