Those machine gun turrets are quite unusual on the K7. It took a while for planes to become big tubes with wings on them, with the jet engines in pods. Economi

Those machine gun turrets are quite unusual on the K7. It took a while for planes to become big tubes with wings on them, with the jet engines in pods. Economics is the thing, it is down to cost per mile, that is it for passengers and freight (fresh vegetables). The era of experimentation is over. Tilt-rotors, Spruce Gooses, Harrier Jump Jets, Concordes, twin-boom P38s - history.