A few reasons why commercial aircraft are not equipped with ejection seats

As fighter aircraft developed from propeller-driven to jets, it was evident that the traditional way for pilots to escape aircraft was no longer quick enough. Releasing the cockpit canopy, opening the safety harness and then leaving the aircraft took too long in relation to the flight speed. That’s why the ejection seat was developed.

I am sometimes asked about the possibility of ejection seats in commercial aircraft, and I thought I’d write a blog on this subject, as it which appears to be of interest to our readers.

Safety first. With present technology only a pyrotechnic solution is sufficiently powerful for propelling an ejection seat. A couple of kilos of explosive on an aircraft is a considerable risk, however. A misfiring caused by a human error or technical fault could be fatal – whether it happened on the ground in connection with maintenance or during a flight. I recently read an article on the subject, which described how a reporter travelling as a passenger in a jet fighter during a demonstration flight in South Africa ejected himself out of the aircraft by accident during the show.

Explosives loaded onto an aircraft also increase risk in emergency landings, aborted take-offs, small inflight fires and in other situations that generally do not result in fatalities. I dare not think, moreover, what terrorists could achieve if they were able to get their hands on such explosives during a flight.

Even if we were to devise a safety way of propelling the ejection seat, many problems would still remain. The ejection of passenger seats would have to proceed systematically from the rear to the front of the aircraft (lasting 15-20 seconds), so that the seats would not interfere with each other during the ejection process. Even if this, too, could be achieved, the result would still be hundreds of out-of-control passengers falling through the air, many of whom would still be trying to get out of – their already ejected, of course – seats.

Due to g-forces, oxygen deficiency and non-existent control, survival would be challenging, and passengers would also have to be able to use their parachutes and descend correctly onto land or water. Although ejection seats, nowadays, are fairly automatic, the fighter pilots that use them receive very thorough theoretical and practical jump training.

Aircraft, too, would have to be redesigned and recertified: floors would have to be strengthened, overhead lockers removed, and ejection openings added to ceilings. One fighter jet ejection seat costs around 100,000 euros. A new passenger seat –which would, of course, require, an entertainment system :-) – wouldn’t cost any less. The already huge prices of aircraft would rise further. The size of the seats would also mean a lower number of passengers on each flight. The ejection seat, weighing more than 100 kilos, would increase the weight of the aircraft and therefore fuel costs. As a result of all these factors, ticket prices would have to be many times higher than now.

Taking the present safety statistics into account, I don’t believe that passengers would want to pay such sums for their tickets only to find themselves wearing shoulder-straps, feet and hands restraints, helmets, oxygen masks and life vests just in case of a possible ejection – with no baggage or cabin service, either. And don’t even think about visiting the toilet.

Accidents in which ejection seats would have saved human lives are extremely rare. On the other hand, a controlled emergency landing or a skid off a runway will in all probability not result in fatalities. There are many examples of this: in recent times, for example, there have been the AF358 in Toronto and the BA038 in London in 2008 as well as the landing of the US1459 on the Hudson River in New York last year. The cabin seats of a commercial aircraft are designed to withstand the stress of an emergency landing, and the emergency exit systems enable an aircraft to be evacuated in 90 seconds. Crew receive annual evacuation training.

Expanding the idea still further, one could imagine that traffic fatalities would increase if ejection seats were fitted to passenger aircraft. Higher ticket prices would drive some passengers to less safe ground transport.

Finnair monitors the development of flight safety and is ready to accept new ideas to improve safety. The future will tell whether it may be possible to design an ejection seat that would be usable in passenger traffic. Then Finnair will surely once again be among the first to adopt the new technology – as it has been many times before.

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7 Responses to “A few reasons why commercial aircraft are not equipped with ejection seats”

  1. What a post!! Very informative also easy to understand. Looking for more such comments!! Do you have a myspace?
    I recommended it on stumbleupon. The only thing that it’s missing is a bit of color. Anyway thank you for this information.

    Reply
  2. interesting wrote on :

    Well, maybe – but what about this:

    Instead of the oxygen mask – there could be an oxygen tank ( which combat the oxygen-less during free falling )

    I’m sure people won’t mind paying for quality or a increase in safety and they may remove the need for carry-on. You can find other space, maybe a locker area on the plane ( a little creativity isn’t hard to ask for safety?? )

    Also, 15-20 sec. was a good point, but only if it’s immediate danger approaching right? like a close mountain. However, the time between the pilots knowing of danger approaching and actually crashing – there seems to be more than 15-20 to prepare individuals. If not thats just like saying the oxygen mask routine has no purpose? it’s still safety.

    I think you made valid points, and good ones considering your expertise. But i don’t think it is impossible ( given human intelligence & creativity ). I want to believe humans will pay for the trade-off, I don’t think we’re too posh to say “i’ll pay for more leg room over my life please” if so then humans have bigger fish to fry than ejection seats on airplanes.

    thanks for the post.

    Reply
  3. Michael Parker wrote on :

    How about dividing the airplane into self-contained modules, each holding 20-30 passengers? In case of emergency, the modules would come apart and land by deploying multiple parachutes (something like emergency submersibles on oil rigs). That way you don’t need explosives under every seat, there’s no problem with oxygen (the modules can remain pressurized during dettachment), passenger comfort wouldn’t be reduced drastically, the building and maintenance cost is lower and the air company can make a killing (excuse the pun) by marketing the idea of ‘safest way to fly’.

    Reply
  4. Zahid Rasheed wrote on :

    Ya i agree with Michael parker… Airplane cabin must be equipped with parachute and at the time of emergencies when nothing else possible. all engines failed. Nothing in the world pilot could do at this point pilot do one thing press eject button and whole passenger cabin ( even part of passenger cabin ) eject like fighter jet seat . With all the oxygen and pressure human needs to withstand . In addition if that cabin bottom is like a ship or boat so it could float on water. it would save alot of souls.
    May be some thing like this comes in future planes

    Reply
  5. This is a very interesting and informative post. I have wondered many times about the possibility of ejection seats in commercial aircraft. This answered many questions. I suppose that the need for ejection seats in commercial aircraft is not nearly as important as in military aircraft. I’m sure the inherent danger and need for emergency exit from the aircraft is much greater in a fighter style aircraft than in any other. Obviously accidents are going to occur but I feel very comfortable when flying commercially. I must say that prior to reading and commenting on Finnair blogs I had little knowledge of Finnair. I hope to someday have the chance to fly on your airline because everything I read on you blogs impress me more every post I read. You Airline really seems to be a pro-active airline and this is very impressive. Hopefully others will follow. Thank you for the ability to comment.
    Best regards
    Jeremiah

    Reply
  6. One more reason why ejecting seats cant be used in a commercial flight, the engines suck the air into them.If any passenger exits, the engine will suck them in.

    Reply

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