I was just watching a Hanna Barbarra cartoon. The evil Snidely Whiplash and his sort-of evil snickering dog Mutley are in a batwinged bi-plane persuing Captain Cave Man (whos flying a boulder and log bi-plane, explain the aerodynamics of that!), anyway Snidely Whiplash gets tha Cap’n in his crosshairs, fires his machine gun and promptly saws his propeller blades off.
It occured to me that probably really was a problem during WWI. Fast as the propeller may spin, you’ll still probably hit it occasionally. The props were too big to place the guns ABOVE them and still accurately fire them, right? Did they just keep an awful lot of replacement props?