Here's one with the pic you sent.. But, I didn't think it looked right with the Spit on you theme. It insinuated you were spitting on the bomber instead of escorting it. So, I changed that slogan with a more supportive one that matches the image.. Here it is..
As far as making it bigger, you really can't unless you have it actually done bigger, then shrinking it to fit. Making smaller images bigger from a small resolution pic to begin with gets messy.. But, if that image started out larger resolution, making it, and shrinking it to the size you want works better.. the other way around just doesn't work out..
On another note.. I came up with a cool slogan if someone wants it.. I would use it, but since the dog fight is not my expertise, it really doesn't fit me.. But if someone else wants to use it, go ahead.. it is a play on the infamous quote "It's 5 O'Clock somewhere..." For those overseas that may, or may not have ever heard that. It is a quote made famous by the Jimmy Buffett song MargaritaVille.. I think a slogan for a fighter banner could be "It's 6 O'Clock Somewhere..." Of course with the prime attack position reference..