It's like someone took Snoopy's WWI fighter pilot fantasies and developed them as if they were real. :p
About the only thing I'd recommend would be to give the propellers some motion blur. When in flight, they should be moving so fast that we can't really make them out all that well. Otherwise, very good work. Keep it up. :)
It's like someone took Snoopy's WWI fighter pilot fantasies and developed them as if they were real.