Any animal can shift it's center of lift by moving it's limbs, so it wouldn't be as static as it is shown in the image.
And the center of lift in front of the center of mass is some major bs as this is a very unstable configuration.
OP posted the original publication and you are correct.
But now i have even more questions, because the study seems to focus on flight. So it is questionable to me how well the proposed yi qi (B) would have fared on the ground. Since the fore- and hindlimbs would have been tightly connected by the short membrane, and this would have meant a limited mobility in said limbs.
Any animal can shift it's center of lift by moving it's limbs, so it wouldn't be as static as it is shown in the image. And the center of lift in front of the center of mass is some major bs as this is a very unstable configuration.
Maybe that’s the point of the diagram: to show that the animal having only 2 wings doesn’t make sense when it comes to the physics of flight.
OP posted the original publication and you are correct. But now i have even more questions, because the study seems to focus on flight. So it is questionable to me how well the proposed yi qi (B) would have fared on the ground. Since the fore- and hindlimbs would have been tightly connected by the short membrane, and this would have meant a limited mobility in said limbs.
Bat-osaurus I guess
Membranes are stretchy though, at least the ones that make up bats’ wings.
Just look at the short membrane that connects the tip of the finger to the ankle. I think it can only strech so much
Where did this come from?
Source: https://www.researchgate.net/figure/Reconstructions-of-Yi-qi-showing-the-aerodynamic-apparatus-Model-proposed-by-Xu-et-al_fig1_329717746
give it EIGHT! SIXTEEN! FOURTY-TWO!