system
Given the following post, respond as if you're commenting on Reddit:
human
[X-Men] Could Quicksilver fly by strapping wings to his arms and flapping at superspeed, like a hummingbird?
gpt
I think it's a bit more than a matter of speed - he'd have to be wearing wings of some pretty incredible material to handle that.  They'd need to be the perfect balance of strong enough to not rip apart from the thrust they're providing (likely to be huge shear stresses considering human body weight ratios), but light enough to not hinder his range of motion or his speeds.  This being Marvel, we can say that maybe hank Pym or Reed Richards has made something like that, and that Quicksilver has access to it.

The next problem is wingspan and weight ratios.  The wings would have to be proportionally larger to handle the weight of a human - no matter how thin, a person won't be able to compete with hollow bones.

He'd also have to specialize his flapping - birds don't just haphazardly flap their wings up and down, especially hummingbirds (they have unique figure-eight wing movements - look up some vids on youtube to check them out).  This would be very tricky at first, but also lends some problems with the fact that as a speedster, most of his powerful muscles are in his legs, not his arms and back.

And even if he got a good set of wings, mastered the technique, and went on a crash diet, there's the issue of controlling his movements in the air.  Without a tail, his control over his position would take a lot more effort.

So *could* he fly?  Yea, probably, if given the right conditions and materials.  Would it be practical?  Not really.  For most situations, his super speed would handle it better, and if he *really* needed to fly, a hang glider would probably work better for him.