Class PropellerPropulsor

Propeller-driven propulsor using blade element theory. Calculates thrust based on blade pitch angle, RPM, freestream velocity, and airfoil characteristics. Supports fixed-pitch and variable-pitch (constant-speed) configurations.

Inheritance
object
Object
Component
Behaviour
MonoBehaviour
PropulsorBase
PropellerPropulsor
Inherited Members
Namespace: NWH.Aerodynamics.AircraftController.Propulsion.Propulsors
Assembly: NWH.Aerodynamics.dll
Syntax
public class PropellerPropulsor : PropulsorBase

Fields

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Vp

Effective velocity through the propeller disc in m/s. Combination of tangential blade velocity and freestream velocity.

Declaration
public float Vp
Field Value
Type Description
float
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airfoilProfile

Airfoil profile defining lift and drag characteristics of the propeller blades.

Declaration
public AirfoilProfile airfoilProfile
Field Value
Type Description
AirfoilProfile
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aoa

Current angle of attack of the propeller blades in degrees.

Declaration
public float aoa
Field Value
Type Description
float
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autoPropPitch

Enables automatic pitch control to maintain target RPM (constant-speed propeller).

Declaration
public bool autoPropPitch
Field Value
Type Description
bool
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bladeCount

Number of propeller blades. More blades increase thrust but also drag.

Declaration
public int bladeCount
Field Value
Type Description
int
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bladeWidth

Width (chord) of each blade in meters. Affects thrust area calculation.

Declaration
public float bladeWidth
Field Value
Type Description
float
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dragCoefficient

Multiplier for drag force calculation. Higher values increase propeller drag.

Declaration
public float dragCoefficient
Field Value
Type Description
float
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dragMagnitude

Current drag force magnitude in Newtons.

Declaration
public float dragMagnitude
Field Value
Type Description
float
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feather

When true, blades are feathered (90 degrees) to minimize drag. Used for engine-out scenarios in multi-engine aircraft.

Declaration
public bool feather
Field Value
Type Description
bool
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gizmoAngleOffset

Visual offset angle for blade rendering in degrees.

Declaration
public float gizmoAngleOffset
Field Value
Type Description
float
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maxPitch

Maximum blade pitch angle in degrees. Higher values allow more thrust at higher speeds.

Declaration
public float maxPitch
Field Value
Type Description
float
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minPitch

Minimum blade pitch angle in degrees. Lower values provide less thrust for ground/taxi operations.

Declaration
public float minPitch
Field Value
Type Description
float
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peakEfficiency

Peak propulsive efficiency achievable (0 to 1). Typical values: 0.75-0.85 for well-designed propellers.

Declaration
public float peakEfficiency
Field Value
Type Description
float
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pitchAngle

Current blade pitch angle in degrees. Higher values generate more thrust but require more power.

Declaration
[Range(-45, 90)]
public float pitchAngle
Field Value
Type Description
float
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pitchInputBinding

Input axis to use for manual pitch control.

Declaration
public PropellerPropulsor.PitchInputBinding pitchInputBinding
Field Value
Type Description
PropellerPropulsor.PitchInputBinding
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targetPropRPM

Target RPM for automatic pitch control (constant-speed mode).

Declaration
public float targetPropRPM
Field Value
Type Description
float
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thrustCoefficient

Multiplier for thrust force calculation. Use to tune propeller performance.

Declaration
public float thrustCoefficient
Field Value
Type Description
float
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thrustMagnitude

Current thrust force magnitude in Newtons.

Declaration
public float thrustMagnitude
Field Value
Type Description
float
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variablePropPitch

Enables variable pitch control (constant-speed propeller). When false, propeller operates at fixed pitch.

Declaration
public bool variablePropPitch
Field Value
Type Description
bool
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windmilling

Indicates if propeller is windmilling (engine not providing power).

Declaration
public bool windmilling
Field Value
Type Description
bool

Methods

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Awake()

Declaration
public override void Awake()
Overrides
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OnDrawGizmosSelected()

Declaration
public override void OnDrawGizmosSelected()
Overrides
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Step(float, float, float, float, Atmosphere, out float, out float)

Simulates the propulsor for one physics step. Calculates thrust and torque based on angular velocity, freestream velocity, and atmospheric conditions.

Declaration
public override void Step(float inAngVel, float maxAngVel, float inV0, float inTorque, Atmosphere atmosphere, out float outThrust, out float outTorque)
Parameters
Type Name Description
float inAngVel

Input angular velocity in rad/s.
float maxAngVel

Maximum angular velocity in rad/s.
float inV0

Freestream velocity in m/s.
float inTorque

Input torque from engine in N*m.
Atmosphere atmosphere

Atmospheric conditions for air density.
float outThrust
float outTorque
Overrides