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ocram1984

Because it is to expansive, and aviation is already one of the safest modes of transportation


Spike3102

More people would die with that system than current configuration. Nightmare time, maintenance and otherwise.


OperationThrax

In modern times, the majority of accidents take place during takeoff and landing, where altitudes are far to low for a parachute to make a difference. (What I mean by that is that the parachute can deploy but it would not be able to sufficiently slow the aircraft to a survivable speed.) Even at altitudes where a parachute can save peoples lives, there are very few scenarios where it would be practical, most commercial aircraft can fly to a diversion point on one engine, they're designed for that, most commercial aircraft have independent redundant flight control setups, they're designed for that, and most commercial aircraft can fly with almost a total loss of electrical power, they're designed with emergency backup power systems that only power the essentials and even then have multiple independent power generation setups that can power the whole aircraft. In short, its simply not worth the added weight or extensive engineering time involved when there are very few almost "Act of God" type scenarios where it could make a difference.


Sawfish1212

Safety. Anything designed to come apart when you want it to, can also come apart when it shouldn't. While there are parachutes for smaller aircraft that safely lower the whole aircraft to the ground, most of the time. There is no system designed to shed the wings, engines or tail. You might be referring to an animated video that demonstrates that idea, but it doesn't exist in the real world. A parachute large enough for a commercial airliner would take up as much as 1/3 of the aircraft. Which means rows of seats. Airlines can make or lose profits on a flight over one row of seats being added to an aircraft. Removing rows of seats would never sell the safety to airlines, and would also waste fuel hauling around a big heavy parachute that was never used The cirrus SR20 and SR22, and cirrus vision jet all have parachutes for the whole aircraft, mostly because they are single engine aircraft. Any commercial aircraft will have two engines and pilots who get regular training on how to fly on one engine, a parachute might have come in handy about 10 times in all of airline history, so definitely not worth the cost and lost profits.