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 LK8000 International Support
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 Headwind with connected IAS Sensor
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m-a-r-t-i-n
Pulcino

33 Posts

Posted - 15/04/2019 :  08:42:34  Show Profile  Reply with Quote
Hello,

some short questiones:

If I connect a bluetooth Aisspeedsensor to LK8000 will headwind be calculated like:
a) TAS minus Groundspeed or
b) Headwind is Headwindcomponent of latest Wind calculation

If a) is correct, what will be used for final glide calculation?

-) Headwind (always actual if Airspeed is available)
-) Wind coming from latest windcalculation

Thank you and best regards,
Martin






AlphaLima
Moderator

Germany
1688 Posts

Posted - 17/04/2019 :  10:10:44  Show Profile  Visit AlphaLima's Homepage  Reply with Quote
b!
Having the GPS + airspeed the wind is calculated by a quite accurate modified Kalman Filter. (Wind setting "Both")
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hpronto
Pulcino

Portugal
37 Posts

Posted - 17/04/2019 :  12:14:30  Show Profile  Reply with Quote
I believe Head Wind is actually IAS-ground speed. I use this for landing as it is easier to read the wind direction in real time.

@AlphaLima maybe you made some confusion with wind calculation alone?

Hugo
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AlphaLima
Moderator

Germany
1688 Posts

Posted - 17/04/2019 :  14:40:57  Show Profile  Visit AlphaLima's Homepage  Reply with Quote
Ups Sorry,
you're right (we are not in the else condition):
https://github.com/LK8000/LK8000/blob/fc1ef71b542db53da0a2618652b433ee04c063ed/Common/Source/Calc/HeadWind.cpp#L35
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m-a-r-t-i-n
Pulcino

33 Posts

Posted - 17/04/2019 :  17:16:43  Show Profile  Reply with Quote
cool

and is "headwind" used for final glide calculation, or is final glide calculation based on "wind"?
(headwind is currently updated - wind is more difficult to update, because winddirection is more difficult to get)

On the other hand: If I put the Wind manually (because I know, that it will change during gliding) it is better to have it based on wind..
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