Seat Ejection
International Journal of Scientific & Engineering Research, Volume 3, Issue 10, October-2012 ISSN 2229-5518
1
Ejection Seat Mechanism in Civil Aircraft
Richard Johnson
Abstract—this paper deals with the ejection system that can be implemented in a civil aircraft. It is important for an aircraft to have an ejection seat in case the plane meets an accident in a battle or during test flight and the pilot has to bail out to save his or her life. The mechanism involves lifting of the pilot to a safe distance away from the aircraft and then deploying the parachute. As there is increase in air traffic, this ejection system provides additional safety measures to the life of passengers. By this method along with the pilot, the crew members and the passengers can be saved. This ejection system consists of a specially made ejector pad, track system and parachute. The ejection system is governed by a timing sensor which ensures that the movement of the passenger seat take place in equal interval of time to avoid collision between two consecutive seats. Index Terms- Bail, ejector pad, track system, ejection, hydraulic, propulsion, stability.
—————————— —————————— empty weight. Instead of high propulsive power, simple 1 INTRODUCTION spring mechanism is implemented. To avoid the collisions the timing system, sequence and equal interval of ejection is 1.1 Problem statement Ejection seats have been traditionally fitted in military included. aircraft from the late 1940’s and onwards. But it was not used In this method there is no need to open the roof of the in the civil aircrafts because of the following reasons. airplane just we can open the side doors and emergency exit to 1.) Military pilots wore suitable suit which can be an eject the seats. advantage life saver if the ejection has to effect at high ———————————————— altitudes, but was very difficult and delay in dressing Richard Johnson is currently pursuing bachelor degree program in Aeronautical engineering in
1
Ejection Seat Mechanism in Civil Aircraft
Richard Johnson
Abstract—this paper deals with the ejection system that can be implemented in a civil aircraft. It is important for an aircraft to have an ejection seat in case the plane meets an accident in a battle or during test flight and the pilot has to bail out to save his or her life. The mechanism involves lifting of the pilot to a safe distance away from the aircraft and then deploying the parachute. As there is increase in air traffic, this ejection system provides additional safety measures to the life of passengers. By this method along with the pilot, the crew members and the passengers can be saved. This ejection system consists of a specially made ejector pad, track system and parachute. The ejection system is governed by a timing sensor which ensures that the movement of the passenger seat take place in equal interval of time to avoid collision between two consecutive seats. Index Terms- Bail, ejector pad, track system, ejection, hydraulic, propulsion, stability.
—————————— —————————— empty weight. Instead of high propulsive power, simple 1 INTRODUCTION spring mechanism is implemented. To avoid the collisions the timing system, sequence and equal interval of ejection is 1.1 Problem statement Ejection seats have been traditionally fitted in military included. aircraft from the late 1940’s and onwards. But it was not used In this method there is no need to open the roof of the in the civil aircrafts because of the following reasons. airplane just we can open the side doors and emergency exit to 1.) Military pilots wore suitable suit which can be an eject the seats. advantage life saver if the ejection has to effect at high ———————————————— altitudes, but was very difficult and delay in dressing Richard Johnson is currently pursuing bachelor degree program in Aeronautical engineering in
References: 1) 2) 3) 4) 5) 6) 7) United States Air force, “Lockhead F-80shooting star pilot’s operating manual,” pp. 15-28, November 1950. North Atlan Treaty Organization, “Mikoyan MIG-29 fulcrum pilots flight operating manual,” pp. 1-86, change 4 – 2007. United States Air force, “republic F-105 thunder chief pilot’s flight operating instructions,” pp. 34 – 2008. Louies A D’Aulerio, “Development of continuous mode sequencing concept for ejection seat,” pp.20, 1983. “Popular science,” pp. 50, 2003. David Shayler, “space rescue,” “ensuring the safety of manned space craft,” pp. 180, 2009. Jeffrey R. Davies, Robert Johnson, Jan Stepanek, “fundamentals of aerospace medicine,” pp. 104, 2008. Fig8 Moments of aircraft IJSER © 2012 http://www.ijser.org International Journal of Scientific & Engineering Research, Volume 3, Issue 10, October-2012 ISSN 2229-5518 8) 9) Hammord R.Moy, “advanced concept ejection seat (ASES) development and qualification,” pp. 214, 1973. Kevin Bonsor, “ http//www.howstuffsworks.com,” “how ejection seat works,” referred on 9th January 2011. 6 10) Thomas J Zenobi, Gary F Whitman, “development of back pack survival kit for ejection seats,” pp. 15, 1982. 11) Panel, “control in an information rich world: report of the panel on future,” pp. 17, 2003. IJSER © 2012 http://www.ijser.org