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Negative distances & ETE on NavLog

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I made a simple flight plan totalling 84 Km with two intermediate waypoints of about 25 miles. I have included the "Calculate TOC/TOD Waypoints”. The resulting log showed a -5 Km and -5 min ETE between my departure airport and TOC and -2Km and-1min ETE between the TOD and arrival airport. The cruise altitude was 5500 feet ASL and both airports were around 3000 ASL. Any ideas?

 

Thanks for a great weather engine and a simple & efficient software.

Mario Bergeron 

 

image.jpg

I made a simple flight plan totalling 84 Km with two intermediate waypoints of about 25 miles. I have included the "Calculate TOC/TOD Waypoints”. The resulting log showed a -5 Km and -5 min ETE between my departure airport and TOC and -2Km and-1min ETE between the TOD and arrival airport. The cruise al**ude was 5500 feet ASL and both airports were around 3000 ASL. Any ideas?

 

Did you give it the correct rate of climb, rate of descent and speeds? If you did, then there is a bug...

 

DJ

  • Author

Ubersu,

 

Yes, for a C172 cruising at 103 KTAS, I simply put 500 fpm for the climb and descent.

Mario Bergeron 

 

image.jpg

Yes, for a C172 cruising at 103 KTAS, I simply put 500 fpm for the climb and descent.

 

Well, the numbers computed are obviously wrong with the exception of time to climb which should be +5 minutes - time of descent would be the same and the distance taken for climb and descent should be similar. Have you tried the same computation using miles rather than km; since the TAS is in knots (not metric) I wonder if km might confuse the program?

 

DJ

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