No1 could do with a little sharpening. 2,3 & 4 are not really in focus and the last has too much sky. You should have brought the lens down a little so you can see the wheels. What lens/camera were you using?
I was at Leuchars airshow last year and loved it! Here's a small sample.
unfortunately not alot i could do about the pics was at 300mm and with the flying plance really had to crop them pretty tight , the b24's unfortunately I could not get closer to because we had to leave, problem with the kids and had to shoot them across the road there, so no wheels, cause there are cars I cropped out, kinda liked the tail ends or the b24's agains the cloouds in the sky so cropped it like a wide angle shot....these are pretty much just for some snapshots to keep around, I think the only one I may really be able to do much anything with is the first one(possibly)