https://amablog.modelaircraft.org/amamuseum/2017/03/27/new-addition-knight-twister/
New Addition: Knight Twister - National Model Aviation Museum Blog
Mar 27, 2017 - The Multi-Wing Championships, held in Omaha, NE in 1973, were the precursor to the evolution of the Tournament of Champions and IMAC competition. Flying th ...
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