Some knowledge of aerodynamics and the physiology of winged animals would quickly lead to the following conclusion.
- A human with wings who could fly using his own muscle power would not look much like a human being.
A lot of redesign would be required to cut down both the weight & the distribution of it to allow for stable flight.
If you assume a creature with 6 limbs, the arms & legs would have to be much lighter. Such a person would not be able to run very fast, jump, or lift much weight. Note also that a creature with 6 limbs would require three sets of muscles: Flap wings, power the arms, & power the legs. The extra set of muscles (& 4 limbs in additon to the wings) would add weight, requiring even more weight reduction elsewhere.
If you assume a quadruped, what do you sacrifice: Your Arms or your legs? I suppose hands could be at the end of the wings, useful only for very simple tasks. Doing two handed jobs would be very clumsy. I do not think many (if any) winged creatures can bring their wing tips close to touching. An alternative would be to have lower limbs which were hands instead of feet. This would allow the use of tools, but walking would be clumsy. Note that no winged creature can sit and use both feet to pick something up. There are some problems here.
Even if you redesign a human to reduce the weight by 50%, you would still need huge pectoral muscles to flap the wings. Perhaps the pectorals would have to be as much as 3 or4 feet thick.
The brain & skull would likely require resign to both save weight & to allow for stable flight. Note that all winged creatures have heads which are small compared to overall body size.
As far as I know the pterosaurs were the largest creatures who could fly. I do not think that their bodies weighted more than 100 pounds, if that much. Some think that a pterosaur could not take off on a still day from a level plane. They might havew required running into the wind or taking off rom a cliff. They seem to be designed more for gliding than powered flight