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why do helicopters have tail rotor? - Aircraft Nerds
Indian Air Force inducts first unit of Chinook helicopters in Chandigarh - YouTube
HeliHub.com : Boeing awarded US Army contract for 14 more CH-47F Chinooks - HeliHub.com
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Boeing CH-47 Chinook – Wikipedie
Boeing CH-47 Chinook - Wikipedia
Boeing CH-47 Chinook - Wikipedia
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This Helicopter Fan With Lights Is a Perfect Addition To Any Kid's Bedroom
