Hypersonic 4 is nicely listed in SL, but apparently GameCrafterTeam from Thai have made previous Hypersonics, among other games, as well.
I'm no specialist in flight-games, so I'm not the right guy to start digging, but if anyone is looking for a challenge - good luck!
I do can offer some 1st leads:
resume:
https://www.facebook.com/GameCrafterTeam/info
trailers and other video material about GameCrafterTeam games:
http://www.youtube.com/user/Pawee30948/videos