![Figure 4 from Flight test of a 31.2-foot-diameter modified ringsail parachute deployed at a Mach number of 1.39 and a dynamic pressure of 11.0 pounds per square foot | Semantic Scholar Figure 4 from Flight test of a 31.2-foot-diameter modified ringsail parachute deployed at a Mach number of 1.39 and a dynamic pressure of 11.0 pounds per square foot | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/f2af5ce581621dd3d819de6d12cc839a35671ec9/24-Figure4-1.png)
Figure 4 from Flight test of a 31.2-foot-diameter modified ringsail parachute deployed at a Mach number of 1.39 and a dynamic pressure of 11.0 pounds per square foot | Semantic Scholar
Why don't we install parachutes on helicopters? Like the 3 that deploy on returning space capsules. It may help not every air bag or safety device is perfect but it's good to
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