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http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Asked by: J 2416 views helicopter, lift, NASA, Theory, Wrong Aerodynamics, Helicopter OK so here is a frustrating situation for a new Helicopter CFI working on how to teach lift theory:
http://www.w3.org/ns/prov#wasQuotedFrom	askacfi.com