bbrz Posted July 28, 2016 Share Posted July 28, 2016 (edited) - Edited April 8, 2018 by bbrz i7-7700K 4.2GHz, 16GB, GTX 1070 Link to comment Share on other sites More sharing options...
bkthunder Posted July 28, 2016 Share Posted July 28, 2016 Noticed that there seems to be a TH/MH error with the L-39 navigation instruments. Declination in the Caucasus area is 6°E and this -6° value is automatically set on the KM-8 so that the GMK-1AE shows the correct magnetic heading (which it actually does). Interestingly with this setting the GMK-1AE and the magnetic compass differ by 6° which shouldn’t be the case as both should indicate the same (magnetic) heading. If you set the KM-8 to a 0° correction (true heading) the GMK-1AE now shows the same heading as the magnetic compass, which can’t be correct either. I notice the same. Windows 10 - Intel i7 7700K 4.2 Ghz (no OC) - Asus Strix GTX 1080 8Gb - 16GB DDR4 (3000 MHz) - SSD 500GB + WD Black FZEX 1TB 6Gb/s Link to comment Share on other sites More sharing options...
Ramsay Posted July 28, 2016 Share Posted July 28, 2016 (edited) Noticed that there seems to be a TH/MH error with the L-39 navigation instruments. Declination in the Caucasus area is 6°E and this -6° value is automatically set on the KM-8 so that the GMK-1AE shows the correct magnetic heading (which it actually does). Interestingly with this setting the GMK-1AE and the magnetic compass differ by 6° which shouldn’t be the case as both should indicate the same (magnetic) heading. If you set the KM-8 to a 0° correction (true heading) the GMK-1AE now shows the same heading as the magnetic compass, which can’t be correct either. The GMK-1E reads true headings. The KM-8 is connected to a magnetic sensor so if modelled correctly should display the magnetic heading (known bug). The +6° correction set on the KM-8 compensates for the +6° E magnetic variation/declination so that the GMK-1E will read true headings. It should also be noted that the RSBN station radials broadcast their radials relative to true north, while the western TACAN stations use magnetic bearings. Flight planning should be done using true bearings in the L-39 and MiG-21 because of this. Note: A +6° E magnetic variation/declination means when a magnetic compass reads 0°, the true bearing is +6° Edited July 29, 2016 by Ramsay i9 9900K @4.7GHz, 64GB DDR4, RTX4070 12GB, 1+2TB NVMe, 6+4TB HD, 4+1TB SSD, Winwing Orion 2 F-15EX Throttle + F-16EX Stick, TPR Pedals, TIR5, Win 10 Pro x64, 1920X1080 Link to comment Share on other sites More sharing options...
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