Jet Propulsion/Structures

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The structure transfers the forces generated by the Jet engine to the vehicle and provides internal support for the components.


Externally mounted jet engines are enclosed in nacelles that provide the necessary aerodynamic and structural characteristics.

Access doors[edit]

Thrust reversing flaps and vanes[edit]

Noise abatement[edit]


The pylon connects the nacelle to the body or wing of the airplane. The pylons may include structural fuses to release the nacelle if the jet engines forces exceed pre determined thresholds to reduce damage to the aircraft.


Service forces[edit]

TO Cruise Landing

Failure forces[edit]

Turbine failure Fan blade failure Bird Impact Out of balance

Structural fuses[edit]

Airframe integration[edit]

Wing pylons[edit]

Wing root[edit]

Tail Pylons[edit]

Fin mount[edit]

Tail cone mount[edit]

Fuselage mount[edit]

Pressure vessels[edit]

Drum design[edit]


Axial, Radial




Clearance control[edit]


Bleed air[edit]


The containment structure is usually designed to retain failed blades that detach from the rotor at high speeds. Rotor disks are much more massive than blades and full failures normally cannot be contained in aircraft applications.

Fan containment[edit]

Turbine containment[edit]

Disk containemnt[edit]