Board Thread:General Discussion/@comment-679780-20160723045230/@comment-679780-20160729184944

I believe the original Tornado is Sonic's plane and legally his. he allows Tails to fly it because he is a better pilot than he is as well as maintains the plane well.

However the later planes we see, Tornado 2, Cyclone, Tornado-1, these planes are made and owned by Tails, this is why these planes are more high-tech than Sonic's plane which is just a bi-plane with some modifications.