From 75mm guns on B-25s to Italy’s one-off 102mm monster, WW2 saw aircraft packed with weapons designed for tanks and warships. But in the chaos of combat, these oversized cannons often slowed ...

It said to have a wingspan of 33ft 10in (10.31m) and can fly at speeds of 132mph (212km). After the war, the aircraft were converted for civilian use and re-designed as the Hawk Trainer III.