Spt Posted February 18, 2016 Posted February 18, 2016 (edited) There is an inversion between true and magnetic heading on HSI and HUD on HSI you can choice between NAV and cvNAV ( cap vrai NAV = true heading NAV ) Presently this is magnetic heading on cvNAV and true heading on NAV ! I can illustrate this if you want or you are already agree with me ;) ++ Edited February 20, 2016 by Sp@t After check it's not a bug ;) [sIGPIC][/sIGPIC]
PiedDroit Posted February 18, 2016 Posted February 18, 2016 There is an inversion between true and magnetic heading on HSI and HUD on HSI you can choice between NAV and cvNAV ( cap vrai NAV = true heading NAV ) Presently this is magnetic heading on cvNAV and true heading on NAV ! I can illustrate this if you want or you are already agree with me ;) ++ Also, as per manual, most instruments should indicate mag heading, except HSI in cv mode. HUD should always show mag I think. In Caucasus we should get True heading = Mag heading + 6°
Spt Posted February 18, 2016 Author Posted February 18, 2016 It is not correct : true + 6 = mag You can see on charts And for nevada it's more ;) [sIGPIC][/sIGPIC]
Spt Posted February 18, 2016 Author Posted February 18, 2016 And HUD is according to HSI and INS ;) [sIGPIC][/sIGPIC]
IvanK Posted February 18, 2016 Posted February 18, 2016 Ok Variation in the Caucus is 6 Deg East http://maps.ngdc.noaa.gov/viewers/historical_declination/ To determine Magnetic Heading from True use the following aide memoir ... its been used since Pontious was a pilate :) "Variation East magnetic Least, Variation West Magnetic best" So 130 True in the Caucus is 124 Magnetic In Nevada Variation is 12East So 130 True in Nevada is 118 Magnetic
Spt Posted February 18, 2016 Author Posted February 18, 2016 In Caucase it's true + 6 so 130 true is 136 mag ;) [sIGPIC][/sIGPIC]
IvanK Posted February 18, 2016 Posted February 18, 2016 (edited) Sp@t you need to revisit the basics .... you are wrong ... I have been flying around the planet for the last 42 years and haven't got lost yet :) If variation is East you subtract it from True to obtain Magnetic if Variation is west you add it to true to obtain Magnetic. Have a look in the Mission Editor. ILS courses are displayed in TRUE. So ILS 21L in Nellis shows a course of 220 in the Mission Editor ILS and approach plates show courses as Magnetic. Have a look at the ILS chart for Nellis 21L the ILS course is shown as 209. They have used 11East variation. so 220True - 11East Variation = 209Magnetic :) If you dont believe me have a read here: http://www.schoolofsailing.net/true-and-magnetic.html Edited February 18, 2016 by IvanK
Zeus67 Posted February 18, 2016 Posted February 18, 2016 As per the information we have, all navigation instruments that show heading (HUD, ADI, etc.) use the HSI setting. cNav for True Heading and Nav for Magnetic. There is no flag available except to check the HSI mode. "Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." "The three most dangerous things in the world are a programmer with a soldering iron, a hardware type with a program patch and a user with an idea."
Spt Posted February 18, 2016 Author Posted February 18, 2016 Oh yes I made a mistake ! Thanks IvanK and PiedDroit So I understand if I say in Caucase, when I fly inbound true north I read 354 magnetic heading ! Right? [sIGPIC][/sIGPIC]
PiedDroit Posted February 18, 2016 Posted February 18, 2016 Oh yes I made a mistake ! Thanks IvanK and PiedDroit So I understand if I say in Caucase, when I fly inbound true north I read 354 magnetic heading ! Right? Oui ;)
towsim Posted February 19, 2016 Posted February 19, 2016 If someone needs a little more confusion, I can help.... http://forums.eagle.ru/showthread.php?t=126899 [sIGPIC][/sIGPIC]
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