First, compared to the number of small aircraft world-wide there really aren’t that many crashes, it’s just that a certain number of them are widely publicized making it seem as if they little planes are death traps. They aren’t. Most small airplane pilots aren’t worried about a chute (either for themselves or the airplane) because the odds of needing one are actually quite small. When I knew pilots who engaged in aerobatics they carried a parachute every time they flew in a such a manner because 1) it is required and 2) that’s a situation where you are more likely to need one than flying from point A to point B on a pleasant spring day.
It is somewhat analogous to motorcycles: yes, they CAN be dangerous, and people engaged in certain types of motoring (like racing) do carry additional equipment, but for the most part the vast majority of people engaging in the activity are going to be fine and die of old age, in bed. Yes, the risk is elevated above that of, say, automobiles but it’s not mass carnage and blood all the time.
Second, most small aircraft in existence today were built before this technology was developed. The whole-plane parachute came out of the ultralight/microlight/homebuilding aircraft scene and showed up first in the late 1980’s (if I recall correctly). At first, the size and weight limits largely restricted them to tiny single-seaters. It’s only been in the last decade or two that reliable ballistic recovery parachutes (the technical name for these things) have been developed for airplanes up to four seats.
Third, there are limitations on these parachutes. It’s been close to 10 years since I last sat in an airplane equipped with one of these or read a manual so there might have been advances in the meanwhile I’m not aware of, but I’m going to assume most of the following points still apply in regards to why more new airplanes don’t have these, and why relatively few older aircraft aren’t retrofitted with them (which is, by the way, an option).
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There has to be a sufficiently strong anchor point to attach the 'chute. Particularly with the homebuilt aircraft in the early years there were some unfortunate incidents involving the opening shock removing parts of the airframe or otherwise inducing or worsening self-disassembly. Some very small aircraft simply can not be retrofitted with a parachute for this reason. Now, the Cirrus doesn’t have that problem, it was designed from the get-go to have such a parachute. Some common types of small aircraft, like the Cessna 150/152/170/175/etc. line have had sufficient research and interested parties that there is now a standardized retrofit for those airplanes and indeed some have been outfitted with these systems. Problem is, they cost money not only to install but maintain. You can’t ignore these forever, they must be periodically inspected, maintained, and after a certain amount of time your need to replace the on-board solid-fuel rocket. About that –
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There are some hazards to these systems, to the point they are not legal in all places. Let me explain: you see, that parachute is launched by a solid fuel rocket. That’s because you need to get the 'chute from inside the plane to outside the plane rapidly, so it can deploy quickly, and save your life. That requires sufficient power to not only drag the chute out, overcoming weight and friction, but punch through the side of the airplane. Or the top. Or wherever it’s designed to come out. Yes, there’s a break-away panel installed in front of the thing, but that panel needs to be secure enough to stay on in all flight modes otherwise so it’s not that fragile a seal around it. These systems were outlawed in the UK after some unfortunate accidents involving these systems undergoing maintenance/rocket replacement/other handling. It turns out the little rockets will not only deploy through the sides of aircraft they can deploy through any human bodies that happen to be in the way when one goes off. And that’s really as much detail as I care to know about those accidents. In the US, there are issues involved with shipping solid fuel rockets hither and yon, either for purchase, installation, maintenance, or replacement purposes which can add to the costs of installation and maintenance, not to mention you don’t want someone working on this thing who isn’t fully up to date on how to do it safely.
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There are circumstances where such a recovery system can make an accident worse rather than better. Remember, you’ve got a rocket on board. The Cory Lidle accident, where a Cirrus slammed into the side of a building, generated a larger explosion and more fire than typical of a crashing airplane that size because the ballistic recovery rocket blew up when it crashed and/or caught on fire. Just like airbags can kill people as well as save lives, so too can these systems cause problems as well as solve them.
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Finally, a parachute is not a guarantee. It actually says that right on the freaking side of the parachute/rocket canister. In airplanes I’ve seen equipped with them there’s usually a little placard near the Big Red Handle (yes, it really is a big red handle). Use of such a system in an emergency does not guarantee survival. There was an accident involving a mid-air collision over, if I recall, Colorado a few years back where a ballistic recovery system was properly deployed but, because the airplane was on fire the people on board burned to death before the 'chute gently deposited the flaming wreckage on the ground. There are other examples out there. Even when people survive, there have been instances of severe injury, especially when deployed at low altitude where there is not sufficient time for the system to fully deploy (if I recall correctly, the lowest claimed save was around 100 feet, or around 33 meters, but both men suffered significant injuries requiring hospitalization).
So why doesn’t every small plane have them? Like a lot of things, it’s a trade-off. In this case, sometimes structural limitations, certainly money costs, regulatory restrictions/hassles, and the fact that the number of emergencies where they are truly necessary for survival are only a small minority of emergencies that can occur to a small aircraft. We don’t require pre-airbag regulation cars to be retrofitted with airbags, we don’t require all small aircraft to have whole-plane parachutes.
Nope, it’s sort of the point of the whole thing that a descent under a parachute is at least likely to be survivable. It’s important to remember that injuries can still occur, but the idea is to smack into the planet (or ocean) gently.
A 'chute landing in a Cirrus is alarming (as is the reason for pulling the Big Red Handle, I’m sure) but the average human being will be able to handle it barring nothing else going wrong. I’ve heard it described as the all-over jolt you get from a car wreck - you’ll feel it for awhile, even if there are no overt and discrete injuries. There is a possibility of whiplash-type injuries both at the time of opening shock (the initial point where the 'chute suddenly slows you down) and at impact. Also, problems from stuff flying around inside the airplane, whacking bodyparts like arms and legs against the interior, and/or other complications (like your airplane being on fire). I’m told that while it is a very exciting ride it’s not a particularly fun one. Basically, a serious emergency followed by two jolts separated by an interlude of terrified boredom during which you can’t do a damn thing but be a passenger.
Yes, one would hope so. Also one hopes everyone else aboard also remains securely belted in.
The “nose down” portion is brief, the intention is for the airplane to land with the landing gear down, which will best absorb the shock of landing impact.
My understanding of what’s involved is not perfect, but I believe what usually happens is that the 'chute kills the forward momentum of the aircraft sufficiently that the wing, lacking enough airflow, loses its lift and stalls. Airplanes, by and large, are designed to have the nose drop when that occurs because, under more normal circumstances, that restores proper airflow and allows the wing to regain lift and continue flying. In this case airspeed is not restored and the airplane, due to the design of the system, adopts a “feet down” posture allowing for a gear-first landing (in theory).
Loss of portions of the aircraft may affect the balance of how this works out - lose a chunk of airplane in a mid-air collision then deploy one of these, well, you might land tail-first, nose-first, sideways… but the odds of your survival will still be considerably greater than otherwise.
It should be noted there are significant speed and weight limitations on these systems. Particularly in regards to speed, there is a risk of damaging the parachute if you deploy above a certain speed. Needless to say, that would be a Bad Thing to have happen on a day that is already turning out badly. Of course, the designers do their best to make these things as robust as possible but there are limits imposed by physics.
There are other hazards, too, after you land - like escaping a sinking airplane, a burning airplane, being stuck up in a tree (people have been killed by exiting airplanes stuck in trees - a friend of mine who got his ultralight stuck in one said it is really tempting to try to cross that final 30 feet or so on your own, especially when it’s taking emergency services hours to get a crane out to you, you’re cold, hungry, thirsty, bits of you hurt, and it’s starting to get dark… but don’t do it) but those are risks of a lot of emergency type landings and not exclusive to parachute landings.