Ju 288G

It would nearly be impossible to aim and it probably could not reload in flight easily.
A shell taking 10 seconds to hit a target moving at 50kph at a range of several kilometres from a plane travelling 400 Kph without a semi automatic or automatic weapon? Sounds impossible.'Not impossible. I used to bull's eye Womp Rats in my T-16 back home.'Whups, wrong universe. Move along.