Some nice shots there.
When I first started at my club(s) I spent far more time taking pictures than flying. That may have been because my picture taking abilities far exceeded my flying ability.
I produced a ton of 4 x 6 pix ( for about 20 cents each at Wal-mart) and posted them on the club bulletin boards. The guys seemed to like having their planes featured.
One small hint on the shot with the orange fence in the way. You can press your lens right up against plastic and metal fences and get a full (( or nearly full) frame shot. I've shot lots of baseball games with my lens squeezed tight to the chain-link fence. It is a good reason to use a filter of some kind over your expensive lens, of course.
I shoot a Sony A350 with a Sony 28-250 lens. Seems to cover all my needs. No lens to change..hardly ever.
The P-47 ( six foot wing-span) shot shown below was published in a local free paper.
Microsoft Office 2010
Microsoft Office 2007