Very nice work, I like Air Shows. In June I attend an Air Show in Karup Denmark. I brought my Nikon D70 and a brand new Nikkor 70-300 with me, and had just to learn. I attend for two days, the first with the though guys, the spotters, and return with more than 100 photos of the blue sky, and a bunch of unsharp pictures, but the next day I had learn the lesson, and the 70-300 mm was working hard on AF, and did a excellent job. Highly recommended for Air Shows, specially in combination with the RAW format.
Regards Nybo