You are going to have to form muscle attachment points for the wing muscles. If you want your flying humans to have wings AND arms separately, then things could get slightly complicated. In case of membranous wings (bat/pterosaur grade), these are relatively light and you can make do with lesser shoulder muscles. If you want to use bird feathers for human flight, the shoulder muscles would have to be really really powerful. Yes! For the scale of human flight, bird feather WOULD be heavy. Are you going to opt for membranous wings (like pterosaurs or bats), crustacean wings (membranous, but different type, ones you see on insects) or feather wings (self explanatory, all bird wings are these types)? I think crustacean wings are not an option as they cannot take high air pressure and would tear open quickly.īird feathers are very strong and offer the best air-thrust method, but they are also heavy. Of course the human will fold the wings and keep them on their back just like birds, when not in use. So a human with 6 ft height would have a wingspan of at least 11 feet when the wings are fully open. That is, you open up their wings, the wingspan will be greater than their length. If you examine any flying creature you will find out that their width is greater than their length. A huge pterosaur (3 times the size of a human) would have bones completely hollow and no more than 1 mm thick. Pterosaurs were those huge flying monsters that ruled the skies in the times of dinosaurs. At least bird-grade bones or better yet, if you can get pterosaur-grade bones. We are talking about extremely hollow bones here. You are going to need a very very very light skeleton.
Here I will go on to explain how can you create (in a novel of course) flying humans. You are trying to judge something which is not scientific, under scientific rules. However if you are asking the anatomy of an angel, you are asking an absurd question. If you mean how you can create anatomically correct models of flying humans, then this question can be scientifically and rationally answered.