wingSectionType

A section is a coordinate system at a spanwise station of the wing, e.g. at the root, a kink or the tip. Its elements place the airfoils in it (wingElementType).

Position

The transformation of the section scales, rotates and translates the section coordinate system relative to the wing coordinate system. The positioning of the section (positioningType) adds a translation in the wing coordinate system: the origin of the section lies at the end of its positioning plus the translation of the section, and the positioning does not rotate the section. A rotation about the y-axis twists the airfoils of the section, e.g. to reduce the angle of incidence towards the tip.

Side view of an airfoil with chord length 1, scaled by the element to chord length 5, and rotated about the y-axis by the section

The figure shows the steps for an airfoil with a chord length of 5: the airfoil (a) is scaled to the chord length by its element (b) and rotated about the y-axis by the section (c). The rotation is exaggerated; a negative angle turns the leading edge downwards.

Example

The kink section of the wing shown in wingType, twisted by -1.5° and holding one element that scales the airfoil to a chord length of 3.4:

<section uID="Wing_kink">
    <name>Kink section</name>
    <transformation>
        <rotation>
            <x>0</x>
            <y>-1.5</y>
            <z>0</z>
        </rotation>
        <scaling>
            <x>1</x>
            <y>1</y>
            <z>1</z>
        </scaling>
        <translation>
            <x>0</x>
            <y>0</y>
            <z>0</z>
        </translation>
    </transformation>
    <elements>
        <element uID="Wing_kink_element">
            <name>Kink element</name>
            <airfoilUID>NACA2412</airfoilUID>
            <transformation>
                <rotation>
                    <x>0</x>
                    <y>0</y>
                    <z>0</z>
                </rotation>
                <scaling>
                    <x>3.4</x>
                    <y>1</y>
                    <z>3.4</z>
                </scaling>
                <translation>
                    <x>0</x>
                    <y>0</y>
                    <z>0</z>
                </translation>
            </transformation>
        </element>
    </elements>
</section>

Wing section with one element

Attributes

Name	Type	Use	Description
`@externalDataDirectory`	`xsd:string`	optional	Directory of the external data file
`@externalDataNodePath`	`xsd:string`	optional	Path of the node inside the external data file
`@externalFileName`	`xsd:string`	optional	Name of the external data file
`@uID`	`xsd:ID`	required	UID

Child elements

Name	Type	OccurrenceHow often the element may appear at this place. The schema writes it as minOccurs and maxOccurs on the declaration.	Description
allThe children below may appear in any order. Each may appear at most once.
`name`	`stringBaseType`	[1..1] required	Name
`description`	`stringBaseType`	[0..1] optional	Description
`transformation`	`transformationType`	[1..1] required	Position and orientation relative to the wing coordinate system
`elements`	`wingElementsType`	[1..1] required	Elements placing the airfoils in the section

wingSectionType

Attributes

Child elements

Used by

In a dataset · 4 paths

In the schema · 1 declaration