Need help in pilot eject system

  • Thread starter ukmmalaysia
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In summary: We need a help with a mathematical model that will simulate the results of ejecting a pilot from a jet.
  • #1
ukmmalaysia
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URGENT need help in pilot eject system

i am an undergraduate from a university. we are now working on an assignment on design a system of jet eject seat. and we need to use the numerical method and MATLAB program to simulate the result. well, hope you all might help us, suggest us, help us in solving this problem..

"""
an British Aerospace jet - Hawk (MK 108 & 208), need an eject seat system.

the eject seat need to fulfill the following spec.

the jet flying angel = +/- 30 degree
the maximum high of the ejected seat = 0.03 - 0.125km
the distance of the ejected seat landing from the jet = 0.10 - 0.25km
speed of the jet = mach 1.1
seat mechanism + max load = 110kg
the maximum acceleration to eject the seat = 22g

we need to find out a system to safely eject the pilot from the plane
 
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  • #2
I'm not sure what exactly you are asking for. Starting from the beginning, have you done any research on how ejection seats work? Are you just trying to build a mathematical model from the given data? You have the load and acceleration...
 
  • #3
Sucked in by a good thread subject. I thought the msg body was going to say:

"Do I cross arms and pull, or pull and THEN cross arms? If anyone could respond in the next... 12 seconds... it would be REALLY appreciated."
 
  • #4
ukmmalaysia said:
the maximum high of the ejected seat = 0.03 - 0.125km
the distance of the ejected seat landing from the jet = 0.10 - 0.25km
speed of the jet = mach 1.1
the maximum acceleration to eject the seat = 22g

we need to find out a system to safely eject the pilot from the plane

22g might kill a pilot - IIRC, they are trained to about 10g. Try this reference - http://hypertextbook.com/facts/1998/PhillipAndriyevsky.shtml - but corroborate with another reference.

Ejecting at Mach 1.1? Especially at 0.03 - 0.125 km. That could be harmful if not fatal. One might wish to determine the pressure as a function of wind velocity.

That distance from the jet is a bit tricky (especially if it tumbles) - the jet will go where it goes, and hopefully the ejection seat does not follow it.
 
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  • #6
thanks 4 ur comment... however wat we need is using the kinematic n dynamic theory to simulate a curve with the given specification by using the MATLAB which relate to numerical method. Hope u all can give ur precious opinion...
 
  • #7
If one translated that, I believe you would find it means: Could someone please do our homework?
 

1. How does a pilot eject system work?

The pilot eject system is a safety mechanism installed in aircrafts that allows the pilot to quickly and safely exit the aircraft in case of an emergency. It typically consists of a seat with a built-in parachute and a control handle that the pilot can pull to activate the system. Once activated, the seat is propelled out of the aircraft by a rocket, pulling the pilot with it. The parachute then opens, allowing the pilot to descend safely to the ground.

2. What happens to the pilot's seat after ejecting?

After the pilot ejects from the aircraft, the seat is usually designed to fall away or detach from the pilot. This prevents the seat from causing any harm to the pilot or interfering with the parachute deployment. In some cases, the seat may also have its own parachute for safe landing.

3. Is there a limit to how many times a pilot can eject?

Most pilot eject systems are designed for single use only. This means that once the pilot has ejected from the aircraft, the system will need to be replaced or repaired before it can be used again. However, some advanced systems may have the ability to be reloaded and used multiple times.

4. Can the pilot eject at any altitude?

Technically, the pilot can eject at any altitude, but the higher the altitude, the more dangerous it becomes. The ideal altitude for ejection is between 10,000 and 15,000 feet, as this gives the pilot enough time for the parachute to fully deploy and for them to safely descend to the ground. Ejecting at very high altitudes may result in the pilot experiencing extreme cold and lack of oxygen, while ejecting at low altitudes may result in the pilot not having enough time to safely descend.

5. How often are pilot eject systems tested and maintained?

Pilot eject systems are regularly tested and maintained to ensure they are in proper working condition. The frequency of testing and maintenance varies depending on the type of system and the regulations of the aircraft's governing agency. However, it is generally recommended that the systems are tested and inspected at least once a year, and any necessary repairs or replacements are made promptly.

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