Why dont planes have parachutes

It's dangerous for the human body to be exposed to such temperatures so immediately—scientists have suggested that the eyes, mouth, and nose would freeze almost instantly. Wind chill isn't even factored in here. Lungs, too, would expand so quickly that they could explode, reports Popular Science.

Okay, but what if it magically weren't so cold? Sorry, it's still not plausible that jumpers would survive: If the airplane is flying faster than knots around miles per hour , it could lead to injuries or even a fatality due to the forces applied during the deployment.

Given that most passenger airplanes cruise at speeds closer to miles per hour, the odds are not in your favor. There are also structural—and economic—reasons commercial airlines don't carry parachutes for passengers.

This same line of reasoning goes for " why don't more airplanes have rocket thrusters ", " why don't planes have anti-missile systems ", " why don't planes have airbags ", and many other random items.

Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Why don't big commercial planes have full aircraft parachutes? Ask Question. Asked 7 years ago. Active 3 years, 5 months ago. Viewed 37k times. Improve this question.

Pondlife Jay Carr Jay Carr So where exactly is the place where cost, usefulness and safety all converge? And how close to that point would a system like this be? The intent of the questions is different, and a google searcher looking at both questions, I think, would feel the same.

That's mainly my argument here, the questions themselves are different regardless of the information found in the answers of the either question. Rather, companies already make astoundingly safe planes; there is virtually no edge to be gained in the airliner market with safety, because safety is already regulated well past the point where there are relevant differences between aircraft.

And large airliners are pretty much a duopoly, with aircraft purchasers knowing that aircraft are all incredibly safe as a prerequisite to sale and that accidents at some level are inevitable, so there's not really that reputation thing. Show 6 more comments. Active Oldest Votes. Let me do this for you: Parachutes will only help when something essential fails at sufficient altitude for parachute deployment.

As paul said here , most accidents happen at take-off and landing where a parachute cannot be successfully deployed. Parachutes big enough to slow down a whole airliner will be very heavy, reducing payload and increasing the number of flights to transport the same number of passengers.

There are very few situations where it would save anybody. You would have to be in a situation, in daylight, over land, where there is no hope of a landing but plenty of time to get everyone out. I can only think of a single case in the entire history of civil aviation where it could have been useful—The United Airlines Flight case—but then only if the aircraft had been redesigned with a rear exit. Even in that case, jumping was as risky as staying aboard.

This post originally appeared on Quora. Click here to view. BY Quora.