riddle - Wikipedia Says So #2

Previous puzzle of this kind: #1

A bird without wing, body, feet or tail,
An invention am I who can effortlessly sail.
I am unlike my lowly brothers who only deliver mail;
Surging over the winds I am majestic without fail!

...Alas, that is a lie, I do have one shortcoming

In order to be useful to you I cannot be made thin.
Thanks a lot, you, you darned and cursed thing!
Now there are barriers I shan't break, oh, races I'll never win!

You say that there's a Wikipedia article for anything?
Find mine, then, and declare yourself this puzzle's king!

Hint 1:

My stability was an issue that my creators did see
That is the reason why they taught me to sweep.

Hint 2:

UFOs have a generic shape;
I do too, though not from space

Answer

Are you?

https://en.wikipedia.org/wiki/Flying_wing

A bird without wing, body, feet or tail, An invention am I who can effortlessly sail.

Aircraft, plane or drone

I am unlike my lowly brothers who only deliver mail; Surging over the winds I am majestic without fail!

...Alas, that is a lie, I do have one shortcoming In order to be useful to you I cannot be made thin.

Needs to have room for engines, fuel, cabin inside the wing.

Thanks a lot, you, you darned and cursed thing! Now there are barriers I shan't break, oh, races I'll never win!

Will never break the sound barrier. Too thick to hold the equipment.

You say that there's a Wikipedia article for anything? Find mine, then, and declare yourself this puzzle's king!