Resultant force on aircraft door

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SUMMARY

The resultant force on an aircraft door is determined by the pressure difference between the cabin and the external environment. Given an external air pressure of 28 kPa and an internal cabin pressure of 100 kPa, the resultant force can be calculated using the formula: Force = Pressure Difference × Area. For a door area of 2 m², the resultant force is 144 kN directed inward. The door remains stationary due to reaction forces from the hinges, resulting in a net force of zero on the door itself.

PREREQUISITES
  • Understanding of pressure concepts in fluid mechanics
  • Familiarity with basic physics equations related to force and pressure
  • Knowledge of aircraft cabin pressurization systems
  • Experience with calculating forces on surfaces based on area
NEXT STEPS
  • Study the principles of fluid dynamics related to pressure differentials
  • Learn about the mechanics of aircraft door systems and their structural integrity
  • Explore the effects of altitude on air pressure and its implications for aviation safety
  • Investigate the role of reaction forces in static equilibrium of structures
USEFUL FOR

Aerospace engineers, physics students, and professionals involved in aircraft design and safety assessments will benefit from this discussion.

Andy21
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Homework Statement


The air pressure at the altitude an aircraft is flying at is 28kPa. If the pressure inside the cabin is maintained at 100kPa, what is the resultant force on a door of area 2m^2 in the side of the aircraft?

Homework Equations





The Attempt at a Solution



I am not sure whether the answer is 0N because the door must be stationary and therefore no resultant force must be acting on it or do you have to work out the pressures exerted on the door from outside and inside the aircraft and then subtract the smaller of the forces.
 
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Yes, your looking for the resultant force from the pressure difference over that area. The reason the door doesn't move is because there is reaction forces applied by the hinges..so the true net force on the door is zero.
 
thanks for the help
 

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