Ballute

A ballute (a portmanteau combining "balloon" and "parachute") was invented by Goodyear in 1958. It is a parachute braking device that is optimized for use at high altitudes and high supersonic velocities. The original ballute was a cone-shaped balloon with a toroidal burble fence fitted around its widest point. The burble fence is an inflated toroidal structure on a ballute intended to ensure flow separation. This stabilizes the ballute as it decelerates through different flow regimes (from supersonic to subsonic).