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GS quirk on first leg when manually setting all legs wind


GS quirk on first leg when manually setting all legs wind
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sjhoare77
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sjhoare77
posted 6/10/2020 10:10:46 PM
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Hi,

Planning a route today on my Android tablet using the latest version of SkyDemon and I noticed the following oddity. I was overriding the auto winds, as I was practising using my whizz wheel, so had set an all legs wind of 300/10. However on the first leg with a track of 324 deg my PLOG (attached) shows a ground speed of 90 kts; whereas the minimum it could be fighting a straight on headwind would be 100 kts. Has anyone seen this before or can indicate where I've screwed up?

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Tim Dawson
Tim Dawson
Tim Dawson
posted 6/16/2020 12:02:10 PM
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The TAS/IAS column could be, I suppose. I am not sure how we would arrive at a number that would be helpful to most people.
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GS quirk on first leg when manually setting all legs wind
sjhoare77 - 6/10/2020 10:10:46 PM
     Whilst the PLOG shows the cruise speed TAS, the calculation is...
grahamb - 6/11/2020 12:46:59 AM
     You haven't screwed anything up (probably), it's just difficult to...
Tim Dawson - 6/12/2020 8:35:31 AM
             Thanks Tim - much appreciate your input on that. I really did think I...
sjhoare77 - 6/12/2020 9:32:48 AM
     The average leg groundspeed is essentially what is shown already -...
Tim Dawson - 6/15/2020 8:54:36 AM
             Perhaps the TAS shown could be averaged as well, to help comprehension...
grahamb - 6/15/2020 8:59:29 AM
     The TAS/IAS column could be, I suppose. I am not sure how we would...
Tim Dawson - 6/16/2020 12:02:10 PM
     I, personally, wouldn't bother. Maybe put a one sentence explanation...
PaulSS - 6/16/2020 3:43:20 PM

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