I'm looking for a short story that I remember reading, probably in Asimov's (but perhaps in Analog or F&SF), probably in the mid 1990s (unlikely to have been before 1985, or later than 2000).
The main features I remember of the story was that it took place on a toroidal planet or moon, and involved the main character (who was human or humanoid) becoming obsessed with building himself a pair of wings and flying through the atmosphere on the inside of the ring (where I guess the gravity would be much less).
There may have been an ominous and lonely feeling in the story. The main character was quite alone (perhaps marooned), but there were hints of a large bird-like winged alien flying creature that could only be seen in the distance, and perhaps an ancient tower that the main character feels drawn to.
In my (very hazy) memory: at the end of the story the character decides that jumping off the roof of the tower (which is on the inside of the ring) will let him achieve his goal of flying