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aircraft:tmd:propeller [2017/01/23 22:46]
jh
aircraft:tmd:propeller [2018/09/30 13:28]
jh [C172 - Fixed Propeller]
Line 3: Line 3:
 A propeller rotates around a spinning driveshaft which acts a torque onto the propeller. In the Aerofly FS 2 there are two kinds of propellers: the ''propeller'' class implements a propeller behavior in a rotating reference frame, attached to a rotating PropellerBody ([[rigidbody]]) whilst an ''aeropropeller'' uses a stationary Body and rotates itself. In all default Aerofly FS 2 aircraft only the ''propeller'' class is used. A propeller rotates around a spinning driveshaft which acts a torque onto the propeller. In the Aerofly FS 2 there are two kinds of propellers: the ''propeller'' class implements a propeller behavior in a rotating reference frame, attached to a rotating PropellerBody ([[rigidbody]]) whilst an ''aeropropeller'' uses a stationary Body and rotates itself. In all default Aerofly FS 2 aircraft only the ''propeller'' class is used.
  
 +=== Other Aerodynamic classes ===
 +
 +[[airfoil]], [[aerowing]], [[aerofuselage]], [[airbrake]], [[aerodrag]], [[bladeforce]]
  
 ===== Body and EngineRotationSpeed ===== ===== Body and EngineRotationSpeed =====
Line 23: Line 26:
 In the example of the Extra 330 LX below the propeller is slightly angled to the right (side thrust). In the example of the Extra 330 LX below the propeller is slightly angled to the right (side thrust).
  
 +{{ :aircraft:tmd:aeropropeller.png?nolink |}}
 ==== Radius ==== ==== Radius ====
  
Line 39: Line 43:
  
 The name is self-descriptive here. A input can be given to change the pitch of a propeller. That way a constant speed propeller can be controlled by a [[governor]], reversed into beta or reverse thrust or feathered. The name is self-descriptive here. A input can be given to change the pitch of a propeller. That way a constant speed propeller can be controlled by a [[governor]], reversed into beta or reverse thrust or feathered.
 +
 +==== CutOut ====
 +
 +This is the fraction of the radius (or maybe the fraction of the area) that is not part of the propeller because of the propeller hub and spinner. The model used in the Aerofly FS 2 accounts for that blade-less portion by the ''CutOut'' scalar.
  
 ===== Aerodynamic Parameters ===== ===== Aerodynamic Parameters =====
Line 64: Line 72:
 > Stay below ''0.1'' to prevent high instabilities. > Stay below ''0.1'' to prevent high instabilities.
  
 +{{ :aircraft:tmd:aeropropeller_lateraldrag.png?nolink |}}
 ===== Example Code ===== ===== Example Code =====
  
-==== Simple Fixed Propeller ====+==== C172 - Fixed Propeller ====
  
-> **Caution**: Requires a [[rigidbody]] called ''PropellerBody'' inside the dynamics section of the [[tmd]].+> **Caution**: Requires a [[rigidbody]] called ''PropellerBody'' as well as an [[airfoil]] object with the name ''AirfoilPropeller'' and inside the dynamics section of the [[aircraft:tmd]].
  
-<code> +<code>            <[propeller][Propeller][] 
-        <[string8][object][propeller+                <[string8][Body][PropellerBody]> 
-            <[string8][Name][Propeller]> +                <[string8][Airfoil][AirfoilPropeller]> 
-            <[string8][Body][PropellerBody]> +                <[string8][EngineRotationSpeed][DriveShaft.RotationSpeed]> 
-            <[string8][EngineRotationSpeed][DriveShaft.GetRotationSpeed]> +                <[string8][DamageOnCrash]      [Engine.Damage]> 
-            <[string8][DamageOnCrash]      [Engine.Damage]> +                <[tmvector3d][R0][2.872302 0.0 0.000406]> 
-            <[tmvector3d][R0][0.0 0.0 0.0]> +                <[tmvector3d][X0][1.0 0.0 0.0]> 
-            <[uint32][NumberBlades][2]> +                <[tmvector3d][Y0][0.0 1.0 0.0]> 
-            <[float64][Radius]      [1.00]> +                <[tmvector3d][Z0][0.0 0.0 1.0]> 
-            <[float64][Pitch]       [1.50]> +                <[uint32][NumberBlades][2]> 
-            <[string8][PitchControl][0.32]> +                <[float64][Radius]      [0.965]> 
-            <[float64][AspectRatio] [7.00]> +                <[float64][Pitch]       [1.52]> 
-            <[float64][CutOut     [0.20]> +                <[string8][PitchControl][0.323]> 
-            <[float64][LateralDragCoefficient] [0.005]> +                <[float64][CutOut     [0.2]> 
-            <[float64][LateralForceCoefficient][1.000]> +                <[float64][AspectRatio] [7.0]> 
-            <[float64][TorqueReduction][0.0]> +                <[float64][LateralForceCoefficient][1.0]> 
-        ></code>+                <[float64][LateralDragCoefficient] [0.0]> 
 +                <[float64][TorqueReduction][0.95]> 
 +            ></code>
 ==== Extra 330 LX - Constant Speed Propeller ==== ==== Extra 330 LX - Constant Speed Propeller ====
  
-> **Caution**: Requires a [[rigidbody]] called ''PropellerBody'' as well as an [[airfoil]] object with the name ''AirfoilPropeller'' and inside the dynamics section of the [[tmd]].+> **Caution**: Requires a [[rigidbody]] called ''PropellerBody'' as well as an [[airfoil]] object with the name ''AirfoilPropeller'' and inside the dynamics section of the [[aircraft:tmd]].
  
-<code> +<code>            <[propeller][Propeller][] 
-        <[string8][object][propeller] +                <[string8][Body][PropellerBody]> 
-            <[string8][Name][Propeller]> +                <[string8][Airfoil][AirfoilPropeller]> 
-            <[string8][Body][PropellerBody]> +                <[string8][EngineRotationSpeed][DriveShaft.GetRotationSpeed]> 
-            <[string8][Airfoil][AirfoilPropeller]> +                <[string8][DamageOnCrash]      [Engine.Damage]> 
-            <[string8][EngineRotationSpeed][DriveShaft.GetRotationSpeed]> +                <[tmvector3d][R0][1.9004   -0.0037    0.0064]> 
-            <[string8][DamageOnCrash]      [Engine.Damage]> +                <[tmvector3d][X0][0.990279 -0.069798  0.000000]> 
-            <[tmvector3d][R0][1.9004   -0.0037    0.0064]> +                <[tmvector3d][Y0][0.069798  0.990279 -0.000000]> 
-            <[tmvector3d][X0][0.990279 -0.069798  0.000000]> +                <[tmvector3d][Z0][0.000000  0.000000  1.000000]> 
-            <[tmvector3d][Y0][0.069798  0.990279 -0.000000]> +                <[uint32][NumberBlades][3]> 
-            <[tmvector3d][Z0][0.000000  0.000000  1.000000]> +                <[float64][Radius]      [0.99]> 
-            <[uint32][NumberBlades][3]> +                <[float64][Pitch]       [1.8]> 
-            <[float64][Radius]      [0.99]> +                <[string8][PitchControl][Governor.Output]> 
-            <[float64][Pitch]       [1.80]> +                <[float64][AspectRatio] [9.0]> 
-            <[string8][PitchControl][Governor.Output]> +                <[float64][CutOut]      [0.2]> 
-            <[float64][AspectRatio] [9.00]> +                <[float64][LateralDragCoefficient] [0.005]> 
-            <[float64][CutOut]      [0.20]> +                <[float64][LateralForceCoefficient][1.0]> 
-            <[float64][LateralDragCoefficient] [0.005]> +                <[float64][TorqueReduction][0.0]> 
-            <[float64][LateralForceCoefficient][1.000]> +            ></code>
-            <[float64][TorqueReduction][0.0]> +
-        ></code>+
aircraft/tmd/propeller.txt · Last modified: 2019/07/07 10:50 by jh