Ever wondered how those planes in World War 1 managed to unload their machine guns without hitting their own propellers? A new video from the Slow Mo Guys tries to explain the logic behind it as it filmed speeding bullets going in and around an aircraft’s propeller at 120,000 frames per second. The video reveals how the … Continue reading This Video Shows How WW1 Aircraft Used Sync Gears To Avoid Bullets From Striking The Propellers