Japanese Pilots Heard 8 .50 Cals Firing — Then Realized B-17s Had Unlimited Ammunition

February twenty-third, nineteen forty-two. Twenty-four thousand feet above Rabaul, New Britain. Petty Officer First Class Saburo Sakai tightened his grip on the control column of his Mitsubishi A6M Zero as he watched the ungainly silver shapes emerge from the clouds below. Six Boeing B-17 Flying Fortresses, their polished aluminum skin catching the tropical sun, lumbered toward Simpson Harbor in loose formation. The young ace of the Tainan Air Group had destroyed Chinese fighters with ease, shredded obsolete biplanes over Hankow, and sent British Brewster Buffaloes tumbling into the Java Sea. But these American bombers represented something entirely new in his experience. Something massive. Something that refused to die easily. If you're enjoying this deep dive into the story, hit the subscribe button and let us know in the comments from where in the world you are watching from today! Through his gun sight, Sakai studied the lead fortress as it maintained steady course toward the harbor two miles below. Four Wright Cyclone engines drove the thirty-ton machine through thin air at altitudes where his Zero's performance began to suffer. The bomber's distinctive tail fins marked it as a B-17E model, the newest variant to reach the Pacific theater. Intelligence briefings at Rabaul had warned Japanese pilots about these aircraft. American heavy bombers with defensive armament unlike anything the Imperial Japanese Navy Air Service had encountered. Multiple machine guns of fifty-caliber, each capable of firing seven hundred fifty rounds per minute. Guns that could reach out and touch a fighter at distances exceeding half a mile.