Digital versions of the original plans as sold by Falconar for $300 are being released under a Creative Commons License    (Please read first) for personal non-commercial use. 
 
Links:
GroupsIo Flying wing group
French meuseum
Fauvel flying wing family
AV-36 and AV-361 plans
Attributions for items on this website used under the Creative Commons License
By Creative Commons - https://creativecommons.org/about/downloads, Public Domain, https://commons.wikimedia.org/w/index.php?curid=39075747

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