Re: the flying scale-model of 'Quetzalcoatlus Northropi', there's the following paper: A. N. Brooks, P. B. MacCready (et al), 'Development of a Wing-Flapping Flying Replica of the Largest Pterosaur', AIAA Paper 85 - 1446, 1985.
(And yes, I gather the beast is officially Q. 'Northropi' because of its resemblance to one of Jack N.'s fabulous flying-wings.)
Cheers,
'Wingknut'