but ihave one solution for all problem who maybe can be use it by plane maker company who always create
  new design for their plane.maybe you can build one tool cho can use it,namely automatic parasut chair.this to
  ol can  put at plane body.before they sale their plane to public.so if there is some thing wrong in that plane or    
  or maybe immergency situation that tool can use for make our passangger come out from plane and that tool
  there is parasut too as automaticlly so all passangger will be safe with that parasut chair who can throw away
  come out from plane.before that we must make that plane can open it as automatic too so all passangger will not have difficulty to move out from that plane.


 and we can make safe our passangger befor that plane will crush or will explose.all company maker will spend lot of money for make it.and of course that plane will expensive price too for sale.but we must have
some solution for our passangger safety too not just make advantage buisness eithaout safety considering. and with inspiration can make all victim plane will become zero % or in another words all passengger will be survive and not worry any more with their safety.cause with automatic parasut chair they can be protect in plane accident or immergency situation too.