By mid 1915, the introduction of the reliable gun synchronizer through the Imperial German Flying Corps created it doable to fireside a closed-bolt machine gun forward through a spinning propeller by timing the firing with the gun to skip the blades. The Allies experienced no equivalent procedure until 1916 https://lanenaghk.blog-a-story.com/19504780/the-fact-about-sig-spear-lt-that-no-one-is-suggesting