POPBL Project Ejection seat

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POPBL ProjectEjection seat
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Members

• Jan Weigl .. modeller
• Mía Korábová .. documentarist
• Jindrich Hála .. auditor
• Jirí Chroustovský . animator

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Pilot Ejection Seat

• In aircraft, the ejection seat is a system
  designed to rescue the pilot or other crew in an
  emergency situation. In most designs, the seat is
  propelled out of the aircraft by an explosive
  charge or rocket motor, carrying the pilot with
  it.

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• Once clear of the aircraft, the ejection seat
  deploys a parachute, and descends safely to
  earth.

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Objectives of the simulation

• To make a model of the ejection seat with the
  specific parameters in the Dynast software.
• To make an animation of the ejection process with
  the parameters generated by Dynast.

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Critical parameters

• 1) The seat has to overpass the rudder of the
  plane.

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• 2) The seat mustnt get over the maximum limit of
  G force. (10 G in direction head legs and 24 G
  in direction chest back)

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Specific parameters

• Minimum ceiling 86 m
• Weight of pilot with seat 138,5 - 203 kg
• Minimal high for ejection 0 m
• Minimal speed of the plane 0 m/s
• Maximal speed of plane 278 m/s

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Strategy of modeling the system

• Make model for rocket force
• Add gravity force to the model
• Add air resistance to the model
• Add nonzero initial speed
• Check specific parametrs
• Check critical parametrs

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View from Dynas ShellDiagram
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Seat trajectory
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Animation
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Ejection seat