Has anyone ever come accross any info on helecopters in WWII? I know use, if any, was extremely limited, possibly just experimental. But my grandfather swears that he saw them for the first time in the marianas in 1945. My searches have all come up empty. I'd figure that if the Germans had jets, they at least experimented with helecopters, right? Well, I don't know, I guess that's why I'm asking.