Further yet with blog entries, extracts with commentary from the Internet web site "Great Power War". Topics in all cases aviation . . . oddities and curiosities for want of a better term and description.
"The Coolest Experimental Planes of World War II"
"Flettner FI 282"
"Most people don’t associate the development of helicopters with World War II, but in fact, prior to the beginning of the war the German Luftwaffe experimented extensively with choppers, and the first accepted design was the open cockpit Flettner FI 282."
"One of the oddest features of the aircraft was its intermeshing rotors, which meant that the two main rotors angled away from each other though the arc of the blades crisscrossed. But they were very carefully synchronized so as not to collide with each other"
"The German air service envisioned using the new aircraft for observation and reconnaissance, anti-submarine warfare, and other roles."
This particular image of the Flettner FI 282 shows the unique dual synchronized and angled-rotors, counter-rotating, no tail rotor required. One engine with two rotor shafts. Click on image to see an enlarged view.
A German 282 flown post-war [WW2] by an American pilot.Thanks to You Tube.
Flettner in the aftermath of the war continuing to design helicopters for USA concerns. Yet one more instance of Operation Paperclip?