- en.wikipedia.org Lockheed AH-56 CheyenneLockheed began construction of the aircraft at its Van Nuys, California facility, and on 3 May 1967, Lockheed held a roll-out ceremony for the AH-56A.
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- jetsprops.com helicopters/the-ah-56-cheyenne-…The Lockheed AH-56 Cheyenne was a cutting-edge attack helicopter designed in the mid-1960s, a time when the United States was heavily involved in the Vietnam...
- warbirdfanatics.com 2023/02/25/ah56-cheyenne/The Lockheed AH-56 Cheyenne was poised to be the most advanced thing. It was a revolutionary attack helicopter killed by politics.
- militaryfactory.com aircraft/detail.php…As the AH-56 program developed, senior US Army personnel began envisioning more roles for the already impressive AH-56 to undertake.
- The Army -- in cooperation with industry -- began developing the AH-56 Cheyenne and the AH-64 Apache during the final years of the Vietnam conflict.
- tvd.im aviation/1271-lockheed-ah-56-cheyenne.htmlLockheed AH-56 Cheyenne HistoryThe AH-56 Cheyenne was Lockheed's first and only foray into development of a production helicopter.
- everythingisaircrafts.wordpress.com 2013/04/22/…The Army awarded Lockheed a contract for ten AH-56 prototypes in 1966 and a production contract, based on flight testing progress later in January 1968.
- old-forum.warthunder.com index.php…Introduction: The Lockheed AH-56A was designed to meet the U.S. Army's requirement for the Advance Aerial Fire Support System (AAFSS).