I found it a challenging day for photography too. I think my problems were mostly my position, the course layout which didn't seem to favour my location, and the bright sun. Oh, and the patches of bright grey high level cloud behind my shots wasn't helping.
In hind sight I wish I'd tried using my polarizer to increase the vibrancy of the shots, but I'm not positive it would've helped.
I can imagine you would've had a lot more trouble than I with the standard lens, so I bet you'e done well given the circumstances.
This shot is good, the framing isn't bad and position of the plane good. Also the plane's quite big relative to the wider view, yet you've got a good number of pilons in FOV.