I'm working on the preliminary design of a 5 foot span scale model of the small morph of the azdharchid pterosaur, Quetzalcoatlus.
Aspect ratio is about 16.5, and design weight is about 29 ounces.
The animals were flap-gliders, and a juvenile about the size of this model would flap at about 3.5 Hz when flapping.
Wing membranes are viscoelastic and tension battened. Length of the head and neck is about the same as the wing semispan. Neck mobility is limited by hard stops in the vertebrae.
Primary pitch control is wing sweep. The tail complex (consisting of the hindlimbs, biological tail, and a membrane flight surface called the uropatagium) has about a third the surface area of the wings, and due to pelvic muscle alignments and attachments is incapable of creating a download. Consequently the 'replica' will be very unstable in flight. I expect it to crash a lot. A LOT. 😀

First step is to generate a sculpture of the head and musculature that I can use as a plug to vacuum form the hollow shells for the head, torso, and legs (these critters were muscled like Arnold Schwarzenegger on steroids). I'm thinking about repurposing old plastic milk jugs for that.

Biggest problem I see at the moment (aside from lack of stability) is the tiny size of the torso relative to the head and neck. It's gonna be hard to find room (volume) for the servos, battery, etc.

Wish me luck....
And I would welcome comments.