[38] Some P-47 pilots claimed to possess broken the sound barrier in steep dives, but afterwards exploration disclosed that due to the strain buildup inside the pitot tube at significant speeds, airspeed readings turned unpredictably exaggerated. As P-47s were in a position to out-dive enemy fighter planes attempting to escape https://www.murakamilab.tuis.ac.jp/wiki/index.php?turnslope32