How Is Lift Force Calculated for an Airplane?

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SUMMARY

The lift force on an airplane can be calculated using Bernoulli's principle, which relates the pressure difference between the upper and lower surfaces of the wings to the airspeed. Given a wing area of 29 m², air density of 0.549 kg/m³, and airflow speeds of 178 m/s above and 140 m/s below the wings, the net upward lift force can be determined by calculating the pressure difference and applying the formula for lift. The final answer should be expressed in kilonewtons (kN).

PREREQUISITES
  • Understanding of Bernoulli's principle
  • Knowledge of pressure calculations (Pressure = F/A)
  • Familiarity with fluid dynamics concepts
  • Basic algebra for solving equations
NEXT STEPS
  • Study Bernoulli's equation in detail
  • Learn how to calculate pressure differences in fluid dynamics
  • Explore the relationship between airflow speed and lift generation
  • Investigate the effects of wing area on lift force
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Aerospace engineering students, physics learners, and anyone interested in understanding the principles of lift and aerodynamics in aviation.

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Homework Statement


Consider an airplane of wing area 29 m^2 (both wings combined) flying through air of density0.549 kg/m^3 . From the plane’s point of view, the air flowing above the plane’s wings has
speed 178 m/s , but the air flowing below the wings has speed 140 m/s . What is the net upward lift force on the plane? Assume laminar air flow both above and below the plane’s wings. The plane is flying horizontally. Answer in units of kN.


Homework Equations


Pressure = F/A
Rho= m/volume


The Attempt at a Solution


I am so lost, my brother was sick so I had to pick him up from school and I missed the first part of lecture where he explained this. I'm not even sure what equations I can use. PLEASE HELP
 
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