Have you ever asked yourself why there are no parachutes (or not enough for all passangers) in civil airplanes for emergency situations? Well I have, but the only reason I found is that they are too heavy and take cargo space. Is it plausible to parachute 100 people in case of emergency? What if there is a mechanism to parachute all passangers in their seats through the back of the plain. The seats should be similar with fighter pilot's seats with an incorporated parachute. I do...