Below is a Java Applet which shows the best glide values for a Paraglider.
Switch between various makes. Make-3 is 3 points for the polare. Make-4 uses 4 points to define the polare. Make-5 uses 5 points for the polare.
Move your cursor inside the Applet and point it into the upper left quadrant.
The grid is a 10km/h raster
The green line shows the tangent for the best glide angle
The number on top of the polar is the speed to fly for best glide
The 2 numbers at the cursor are wind speed in km/h and air sink in m/s
The Java Applet should be below this line. If not then you might need the JAVA runtime environment. Or a JAVA enabled Web Browser.
Explanation of the expressions used...
WS stands for Wind Speed in km/h
AS is Air Sink, m/s
GR Glide Ratio
SP is the polar speed to fly
SI polar sink
GS Ground Speed in km/h what your GPS will show you
TS Total sink, what you will see on your Vario
Download the Best zip file
In the zip file is a Java jar file, one can use zip to unzip the jar file.
Then modify the wingdata.xml file and add your glider data to it.
The wingdata.xml file format
PolarCount can be 3 or 4 or 5 for the amount of polare points
The first point has to be the minimum sink point. Where the polare tangent is horizontal.
The next points have to points on the polare as the speed increases.
The last point is the top speed on the polare.
A point is defined by the speed in km/h and a sinkvalue im m/s
Java 1.4 has to be installed
To run the code on your computer, get the Best.jar file .
In a Command Window, jar -xvf Best.jar
And use java BestTurn to bring up the code on your computer.
The code has also been integrated with T3D2
Known bugs :
Not very robust code, do not deviate and experiment with different input format.
The code will freeze up your computer.
5 point polare go wobbly, having dents, typical behaviour of a spline curve as the degree goes up