> why not just move the guns so they do not shoot through the props? Some did do just that. With the British Foster mounting[0] variants of the S.E.5a, Sopwit

> why not just move the guns so they do not shoot through the props? Some did do just that. With the British Foster mounting[0] variants of the S.E.5a, Sopwith Camel and Nieuport fighters mounted their guns over-wing and above the arc of the propeller. Convergence issues still apply here, as noted by the other comments. [0] https://en.wikipedia.org/wiki/Foster_mounting https://en.wikipedia.org/wiki/Foster_mounting