Free on-line flight computer. Find GS - Drift etc.
DETERMINING MAGNETIC HEADING AND GROUNDSPEED
Warning it is your responsibility to ensure data you rely upon for a safe flight is correct.
There is no warranty that the program/information here is correct so please cross check.
Usage Example:
Magnetic course 095°
True airspeed 110 kt.
Magnetic wind 150° at 20 kt.
• Rotate the plotting disc so the magnetic wind direction of 150° is at the top.
(Click to activate then click and drag numbers)
• Place a red dot 20 kt. up from the grommet. (double click) This represents the wind speed, also called a wind dot. You can move the grommet (Click on outer white edge) over 100 first to make the addition easier if you wish. (100 + 20 = 120)
• Rotate the disc so the magnetic course of 095° is at the top.
• Slide the disc (do not rotate) so the wind dot is on the 110-kt. speed arc.
• The drift is determined by the wind dot and the wind correction lines.
In this example, the wind dot is 10° to the right of the center so your Magnetic Heading is 105° (95° + 10°). Ground speed 97kt is read under the grommet.
If you've covered 100nm in 70min what's your Ground Speed?
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Move the inner white scale so 70 (min in this case) is pointing up under 100 (nm in this case)
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The pointer is at 86 = GS 86 knots..
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Now try 30nm in 15min. Move the white 15 to the bottom opposite the black 30
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Pointer = 120kt. Which you already knew :)
Copyright (C) Sancho McCann.
This software comes with ABSOLUTELY NO WARRANTY.
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