Sorry I missed this yesterday. ; For future reference, here are the tips I was given:
For jets, shoot aperture priority wide open, since depth of field is not an issue and you want a fast shutter speed.
For props, shoot shutter priority. ; I usually start with 1/180. ; Bigger props (like those on bombers) turn slower than the smaller ones on fighters and aerobatic planes, so you can adjust accordingly. ; Use your panning skills.
The neat thing about this is you can pre-set your camera for aperture and shutter priority modes, then just switch between the two depending on what's in the air.