James,
Decent job for your first airshow. 
Just curious, since you pointed out that you shot almost 12GB, did you shoot Raw or Jpeg?
Frank definitely hit the nail on the head so to speak. Prop's look very strange when frozen in mid-air. Start at 1/160th and you will capture some prop blur, while still maintaining fairly crisp planes. One thing I will point out, your images look quite under-exposed. Checking your Exif, it shows you did not use any Exposure Compensation (EC).
Adding EC, while it will usually blow out the sky, you retain details on the aircraft, instead of the plane appearing to be a black mass in the sky.
Here are a pair of example's of what I am referring to, when using EC. Both yours & my images of the HL Viper are probably the same bird. These are from Indy this year, which is a heavily back-lit airshow. 
1st: Viper pulling vapor. EC +1 2/3.
#2: Viper & P-51 doing Heritage Flight: +1 1/3 @ 1/100th Sec.