Very nice set. Although I would suggest a slower shutter speed when shooting prop driven planes to show that the engines are actually running as apposed to looking like they are a "dead stick" Even the shot of the green plane would benefit from a slightly slower shutter to achieve an even nicer prop blur.
Here's a shot I did a few years ago that shows a good prop blur.
Of course the hard part about shooting at these slower shutter speeds is that you will have to practice panning to get a good sharp image like the one I linked to above. Depending on the type of plane and how fast the prop is spinning you need to be at 1/200 sec. or lower (most planes usually need around 1/125 to 1/160 sec. to achieve a good prop blur. This of course will translate in to a blurry image (especially when shooting longer focal lengths) unless you perfect your panning technique, and even then you still may get some blurry images.