--- name: BodyAngularVelocity last_updated: 2026-06-10T23:09:11Z inherits: - BodyMover - Instance - Object type: class memory_category: Instances tags: - Deprecated summary: "Applies a torque to maintain a constant angular velocity." --- # Class: BodyAngularVelocity > Applies a torque to maintain a constant angular velocity. ## Description The `BodyAngularVelocity` object applies a torque (rotational force) on an assembly such that it maintains a constant angular velocity as determined by its [AngularVelocity](/docs/reference/engine/classes/BodyAngularVelocity.md) property. This allows for the creation of assemblies that continually rotate. It is the rotational counterpart to a [BodyVelocity](/docs/reference/engine/classes/BodyVelocity.md). If you would like to maintain a constant angular displacement, use a [BodyGyro](/docs/reference/engine/classes/BodyGyro.md) instead. ## Properties ### Property: BodyAngularVelocity.AngularVelocity ```json { "type": "Vector3", "access": "ReadWrite", "security": { "read": "None", "write": "None" }, "serialization": { "can_load": true, "can_save": true }, "thread_safety": "ReadSafe", "category": "Goals", "capabilities": [ "Physics" ] } ``` This property is a [Vector3](/docs/reference/engine/datatypes/Vector3.md) which determines the goal angular velocity a [BodyAngularVelocity](/docs/reference/engine/classes/BodyAngularVelocity.md) should maintain through the exertion of torque. For this property, the direction of the vector is the axis of rotation. The magnitude is the angular velocity in **radians per second**. You can multiply a [Vector3](/docs/reference/engine/datatypes/Vector3.md) by [math.rad(360)](/docs/reference/engine/globals/math.md), or `2π`, in order to convert angular frequency (rotations per second) into the desired angular velocity (radians per second). ### Property: BodyAngularVelocity.MaxTorque ```json { "type": "Vector3", "access": "ReadWrite", "security": { "read": "None", "write": "None" }, "serialization": { "can_load": true, "can_save": true }, "thread_safety": "ReadSafe", "category": "Goals", "capabilities": [ "Physics" ] } ``` This property determines the limit of the torque that may be exerted on each world axis. If an assembly isn't moving, consider raising this value and also check that it is not [Anchored](/docs/reference/engine/classes/BasePart.md) or attached to another anchored assembly). See also [P](/docs/reference/engine/classes/BodyAngularVelocity.md) (power). ### Property: BodyAngularVelocity.P ```json { "type": "float", "access": "ReadWrite", "security": { "read": "None", "write": "None" }, "serialization": { "can_load": true, "can_save": true }, "thread_safety": "ReadSafe", "category": "Goals", "capabilities": [ "Physics" ] } ``` This property determines how much power is used while applying torque in order to reach the goal [AngularVelocity](/docs/reference/engine/classes/BodyAngularVelocity.md). The higher this value, the more power will be used and the faster it will be used. ### Property: BodyAngularVelocity.angularvelocity ```json { "type": "Vector3", "access": "ReadWrite", "security": { "read": "None", "write": "None" }, "serialization": { "can_load": true, "can_save": false }, "deprecated": true, "thread_safety": "ReadSafe", "category": "Goals", "capabilities": [ "Physics" ] } ``` > **Deprecated:** This deprecated property is a variant of [BodyAngularVelocity.AngularVelocity](/docs/reference/engine/classes/BodyAngularVelocity.md) which should be used instead. ### Property: BodyAngularVelocity.maxTorque ```json { "type": "Vector3", "access": "ReadWrite", "security": { "read": "None", "write": "None" }, "serialization": { "can_load": true, "can_save": false }, "deprecated": true, "thread_safety": "ReadSafe", "category": "Goals", "capabilities": [ "Physics" ] } ``` > **Deprecated:** This deprecated property is a variant of [BodyAngularVelocity.MaxTorque](/docs/reference/engine/classes/BodyAngularVelocity.md) which should be used instead. The maxTorque property is a deprecated variant of [BodyAngularVelocity.MaxTorque](/docs/reference/engine/classes/BodyAngularVelocity.md) that lets you set how much force could be applied to each axis. ## Inherited Members ### From [Instance](/docs/reference/engine/classes/Instance.md) - **Property `Archivable`** (`boolean`): Determines if an Instance and its descendants can be cloned using - **Property `archivable`** (`boolean`): *(deprecated, hidden)* - **Property `Capabilities`** (`SecurityCapabilities`): The set of capabilities allowed to be used for scripts inside this - **Property `Name`** (`string`): A non-unique identifier of the Instance. - **Property `Parent`** (`Instance`): Determines the hierarchical parent of the Instance. - **Property `PredictionMode`** (`PredictionMode`): - **Property `RobloxLocked`** (`boolean`): A deprecated property that used to protect CoreGui objects. *(hidden)* - **Property `Sandboxed`** (`boolean`): When enabled, the instance can only access abilities in its `Capabilities` - **Property `UniqueId`** (`UniqueId`): A unique identifier for the instance. - **Method `AddTag(tag: string): ()`**: Applies a tag to the instance. - **Method `children(): Instances`**: Returns an array of the object's children. *(deprecated)* - **Method `ClearAllChildren(): ()`**: This method destroys all of an instance's children. - **Method `Clone(): Instance`**: Create a copy of an instance and all its descendants, ignoring instances - **Method `clone(): Instance`**: *(deprecated)* - **Method `Destroy(): ()`**: Sets the Instance.Parent property to `nil`, locks the - **Method `destroy(): ()`**: *(deprecated)* - **Method `FindFirstAncestor(name: string): Instance?`**: Returns the first ancestor of the Instance whose - **Method `FindFirstAncestorOfClass(className: string): Instance?`**: Returns the first ancestor of the Instance whose - **Method `FindFirstAncestorWhichIsA(className: string): Instance?`**: Returns the first ancestor of the Instance for whom - **Method `FindFirstChild(name: string, recursive?: boolean): Instance?`**: Returns the first child of the Instance found with the given name. - **Method `findFirstChild(name: string, recursive?: boolean): Instance`**: *(deprecated)* - **Method `FindFirstChildOfClass(className: string): Instance?`**: Returns the first child of the Instance whose - **Method `FindFirstChildWhichIsA(className: string, recursive?: boolean): Instance?`**: Returns the first child of the Instance for whom - **Method `FindFirstDescendant(name: string): Instance?`**: Returns the first descendant found with the given Instance.Name. - **Method `GetActor(): Actor?`**: Returns the Actor associated with the Instance, if any. - **Method `GetAttribute(attribute: string): Variant`**: Returns the value which has been assigned to the given attribute name. - **Method `GetAttributeChangedSignal(attribute: string): RBXScriptSignal`**: Returns an event that fires when the given attribute changes. - **Method `GetAttributes(): Dictionary`**: Returns a dictionary of the instance's attributes. - **Method `GetChildren(): Instances`**: Returns an array containing all of the instance's children. - **Method `getChildren(): Instances`**: *(deprecated)* - **Method `GetDebugId(scopeLength?: int): string`**: Returns a coded string of the debug ID used internally by Roblox. - **Method `GetDescendants(): Instances`**: Returns an array containing all of the descendants of the instance. - **Method `GetFullName(): string`**: Returns a string describing the instance's ancestry. - **Method `GetStyled(name: string, selector: string?): Variant`**: Returns the styled or explicitly modified value of the specified property, - **Method `GetStyledPropertyChangedSignal(property: string): RBXScriptSignal`**: - **Method `GetTags(): Array`**: Gets an array of all tags applied to the instance. - **Method `HasTag(tag: string): boolean`**: Check whether the instance has a given tag. - **Method `IsAncestorOf(descendant: Instance): boolean`**: Returns true if an Instance is an ancestor of the given - **Method `IsDescendantOf(ancestor: Instance): boolean`**: Returns `true` if an Instance is a descendant of the given - **Method `isDescendantOf(ancestor: Instance): boolean`**: *(deprecated)* - **Method `IsPropertyModified(property: string): boolean`**: Returns `true` if the value stored in the specified property is not equal - **Method `QueryDescendants(selector: string): Instances`**: - **Method `Remove(): ()`**: Sets the object's `Parent` to `nil`, and does the same for all its *(deprecated)* - **Method `remove(): ()`**: *(deprecated)* - **Method `RemoveTag(tag: string): ()`**: Removes a tag from the instance. - **Method `ResetPropertyToDefault(property: string): ()`**: Resets a property to its default value. - **Method `SetAttribute(attribute: string, value: Variant): ()`**: Sets the attribute with the given name to the given value. - **Method `WaitForChild(childName: string, timeOut: double): Instance`**: Returns the child of the Instance with the given name. If the - **Event `AncestryChanged`**: Fires when the Instance.Parent property of this object or one of - **Event `AttributeChanged`**: Fires whenever an attribute is changed on the Instance. - **Event `ChildAdded`**: Fires after an object is parented to this Instance. - **Event `childAdded`**: *(deprecated)* - **Event `ChildRemoved`**: Fires after a child is removed from this Instance. - **Event `DescendantAdded`**: Fires after a descendant is added to the Instance. - **Event `DescendantRemoving`**: Fires immediately before a descendant of the Instance is removed. - **Event `Destroying`**: Fires immediately before (or is deferred until after) the instance is - **Event `StyledPropertiesChanged`**: Fires whenever any style property is changed on the instance, including ### From [Object](/docs/reference/engine/classes/Object.md) - **Property `ClassName`** (`string`): A read-only string representing the class this Object belongs to. - **Property `className`** (`string`): *(deprecated)* - **Method `GetPropertyChangedSignal(property: string): RBXScriptSignal`**: Get an event that fires when a given property of the object changes. - **Method `IsA(className: string): boolean`**: Returns true if an object's class matches or inherits from a given class. - **Method `isA(className: string): boolean`**: *(deprecated)* - **Event `Changed`**: Fires immediately after a property of the object changes, with some