8.6: Input of Chord line
Every Wing has a central root airfoil. Click the folder button 'Airfoil chord'.
You can change the chord length in the input field 'Airfoil chord [m]'.
The dimensional unit for entered data is 'meter' [m].
Valid values are >0.
Near the input field are Up/Down-buttons located. They can be used to change
the chord length with mouse clicks.
A click on the right mouse button pops up a menu to set the increment between 0.00001m
and 1m.
The following picture shows three wings with chord length 0.1m, 0.2m and 0.4m.
In this example the reference point for the chord length is 0% (the leading
edge).
The reference point might be changed with the input field 'Reference point for
chord [%]' which accepts values between 0% and 100%.
0% means leading edge, 100% means trailing edge of wing.
Near the input field are Up/Down-buttons located. They can be used to change
the reference point with mouse clicks.
A click on the right mouse button pops up a menu to set the increment between 0.00001%
and 1%.
There is a third method to change the value. Move the mouse cursor into the
input field and click the right mouse button.
A pull-down menu pops up and offers the pre-set values 0%, 25%, 50%, 75%, 100%
for quick selection.
For further information about using the reference point please refer to Chapter 9.3 .
Starting
for example with a rectangle shaped wing (1*0.2m) and setting the reference
point to 100%, the chord to 0.5m you will receive with few steps a delta wing.
The pictures below illustrate this function.