Ballute
![Ballute-equipped Mark 82 bombs being dropped by an F-111 attack aircraft](/Images/godic/202412/23/F-111F_dropping_high-drag_bombs0137.jpg")
![Sketch of ballute components](/Images/godic/202412/23/20110430_BurbleFence_000.svg0137.png")
![Un bombardier américain B-52 Stratofortress largue une série de bombes freinées. Les petits « sacs blancs », visibles à l'arrière des bombes, sont les ballutes permettant de freiner les bombes.](/Images/godic/202412/23/B-52_Stratofortress0137.jpg")
The ballute (a portmanteau of balloon and parachute) is a parachute-like braking device optimized for use at high altitudes and supersonic velocities. Invented by Goodyear in 1958, the original ballute was a cone-shaped balloon with a toroidal burble fence fitted around its widest point. A burble fence is an inflated structure intended to ensure flow separation. This stabilizes the ballute as it decelerates through different flow regimes (from supersonic to subsonic).