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A pressure bulkhead in a transport fuselage is required to

  • A.Carry the wing bending moment
  • B.Support the horizontal tail loads alone
  • C.Maintain the aerofoil section of the wing
  • D.Close the cabin and react the axial load

Answer: D

The bulkhead seals the pressure vessel at each end and reacts the pressure acting on its own area as an axial load into the shell. The rear one is usually domed so that it works largely in membrane tension, which is far lighter than resisting the same load in bending.

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