Where to Find Moment Coefficients?

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SUMMARY

The discussion centers on locating aerodynamic moment coefficients, which are crucial for understanding the performance of various aerodynamic shapes. Users express frustration with the NASG database, noting it only provides plots rather than specific values. The conversation highlights that moment coefficients vary significantly based on body shape and speed/Mach range, and emphasizes the importance of using Computational Fluid Dynamics (CFD) programs and wind tunnel tests for accurate data.

PREREQUISITES
  • Understanding of aerodynamic moment coefficients
  • Familiarity with Computational Fluid Dynamics (CFD) programs
  • Knowledge of wind tunnel testing methodologies
  • Basic principles of aerodynamics and body shapes
NEXT STEPS
  • Research specific CFD software options for aerodynamic analysis
  • Explore methods for conducting wind tunnel tests
  • Learn about the impact of Mach number on aerodynamic coefficients
  • Investigate resources for estimating moment coefficients for various shapes
USEFUL FOR

Aerodynamic engineers, researchers in fluid dynamics, and students studying aerodynamics will benefit from this discussion, particularly those seeking accurate data on moment coefficients for aerodynamic bodies.

physicsCU
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Is there a website that has these?

The NASG database doesn't list values, just a plot (not the best way to read values!). The .dat file with each polar curve seems to only be lift, drag, and AoA.

Any help is appreciated!
 
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physicsCU said:
Is there a website that has these?

The NASG database doesn't list values, just a plot (not the best way to read values!). The .dat file with each polar curve seems to only be lift, drag, and AoA.

Any help is appreciated!
Assuming you are speaking of aerodynamic moment coefficients, you should understand that they are different for each different aerodynamic body shape (not to mention their change over different speed/Mach ranges). Do you have a particular shape in mind? There are some really rough means for estimating them for simple shapes, but the best estimates come from Computational Fluid Dynamic programs and the real data comes from wind tunnel tests.

Rainman
 

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