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aircraft:tmd:airfoil

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aircraft:tmd:airfoil [2018/09/20 12:03] – [Airfoil] jhaircraft:tmd:airfoil [2019/07/07 10:49] – [Airfoil] jh
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 === Other Aerodynamic classes === === Other Aerodynamic classes ===
-[[aerowing]], [[aerofuselage]], [[airbrake]], [[propeller]], [[aerodrag]], [[bladeforce]]+[[aerowing]], [[aerofuselage]], [[airbrake]], [[propeller]], [[aerodrag]]
  
 ===== Angle of attack ===== ===== Angle of attack =====
Line 27: Line 27:
 The lift coefficient Cl and momentum coefficient Cm increase linear with alpha in the Range of ''-AttachedRange'' to ''+AttachedRange'' The lift coefficient Cl and momentum coefficient Cm increase linear with alpha in the Range of ''-AttachedRange'' to ''+AttachedRange''
 The gradient of the lift coefficient in respect to alpha is ''ClAlpha'' which equals 2 * Math.Pi for most real airfoils.   The gradient of the lift coefficient in respect to alpha is ''ClAlpha'' which equals 2 * Math.Pi for most real airfoils.  
-> Leave it at ''6.28'' (2 * pi)+> Leave it at ''6.28'' (2 * pi) unless you are dealing with a delta wing
  
 {{ Airfoil_AttachedRange_ClAlpha.png?nolink }} {{ Airfoil_AttachedRange_ClAlpha.png?nolink }}
Line 127: Line 127:
 ''ClAlphaBase'' is usually the maximum momentum coefficient an airfoil will ever create. ''ClAlphaBase'' is usually the maximum momentum coefficient an airfoil will ever create.
  
-> The lower the value of ''ClAlphaBase'' the more the nose will drop when approaching a stall. Values near ''-0.2'' tend to soften the stall behavior. +> The lower the value of ''CmAlphaBase'' the more the nose will drop when approaching a stall. Values near ''-0.2'' tend to soften the stall behavior. 
  
 {{ Airfoil_Stall_ClAlphaBase.png?nolink }} {{ Airfoil_Stall_ClAlphaBase.png?nolink }}
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 ==== Minimal ==== ==== Minimal ====
 This will fall back to default values for all attributes. This will fall back to default values for all attributes.
-<code>        <[string8][object][airfoil+<code>            <[airfoil][AirfoilTip][] 
-            <[string8][Name][AirfoilTip]> +            ></code>
-        ></code>+
                  
 ==== All ===== ==== All =====
-<code>        <[string8][object][airfoil] +<code>            <[airfoil][NACA0009][] 
-            <[string8][Name][AirfoilTip]> +                <[float64][Cl0][0.0]> 
-            <[float64][Cl0][0.0]> +                <[float64][Cd0][0.007]> 
-            <[float64][Cd0][0.007]> +                <[float64][Cm0][0.0]> 
-            <[float64][Cm0][0.0]> +                <[float64][ClAlpha][6.28]> 
-            <[float64][ClAlpha][6.28]> +                <[float64][CdAlpha][0.4]> 
-            <[float64][CdAlpha][0.4]> +                <[float64][CmAlpha][0.0]> 
-            <[float64][CmAlpha][0.0]> +                <[float64][ClFlap][2.1]> 
-            <[float64][ClFlap][2.1]> +                <[float64][CdFlap][0.05]> 
-            <[float64][CdFlap][0.0]> +                <[float64][CmFlap][-0.3]> 
-            <[float64][CmFlap][-0.2]> +                <[float64][Cd0Base][0.005]> 
-            <[float64][Cd0Base][0.005]> +                <[float64][ClAlphaBase][2.4]> 
-            <[float64][ClAlphaBase][2.4]> +                <[float64][CdAlphaBase][1.8]> 
-            <[float64][CdAlphaBase][1.8]> +                <[float64][CmAlphaBase][-0.45]> 
-            <[float64][CmAlphaBase][-0.2]> +                <[float64][AttachedCenter][0.0]> 
-            <[float64][ClFlapBase][0.5]> +                <[float64][AttachedRange][0.17]> 
-            <[float64][AttachedCenter][0.0]> +                <[float64][StallRange][0.1]> 
-            <[float64][AttachedRange][0.25]> +                <[float64][ClFlapBase][0.5]> 
-            <[float64][StallRange][0.25]> +                <[float64][AttachedCenterFlap][-0.12]> 
-            <[float64][AttachedCenterFlap][-0.12]> +            ></code>
-        ></code>+
  
aircraft/tmd/airfoil.txt · Last modified: 2020/09/28 22:44 by jh