Again nice ones. I'm no expert but just a suggestion - don't zoom in as tight to the aircraft (unless it's a close up of cockpit, engines etc), always leave some 'cropping' room. That way you don't cut wings, tail, nose off. Also when shooting jets leave the camera on AV mode (around F8) that way on nice bright days you'll get a fast enough shutter speed with will lessen the chance of camera shake. If it's a duller day just bump up the ISO.