Nealius Posted July 30, 2021 Posted July 30, 2021 So far experienced with the L-39 on Syria and the UH-1 on Marianas, so it appears to be a DCS-wide issue. Easy test: - UH-1 ground start at Orote (elev. 94ft) - Tune Rota NDB - Morse code audible, ADF needle showing 040 Problem is, there is a 1,500ft mountain between the NDB and Orote on the 040/220 radial.
=475FG= Dawger Posted July 30, 2021 Posted July 30, 2021 (edited) NDB’s are not necessarily limited by line of sight. I am not implying their behavior in DCS is correct. Edited July 30, 2021 by pmiceli 2
Nealius Posted July 30, 2021 Author Posted July 30, 2021 I've found a lot of sources saying the same, and one saying that NDB/ADF signals follow the curvature of the earth. I can't find anything talking about terrain effects. Atmospheric bounce?
corvus5624 Posted July 30, 2021 Posted July 30, 2021 Given the very low frequency of the signals (for radio waves that is), there is a ground wave next to the so-called sky wave. The ground wave is typically weaker than the skywave, especially over mountainous terrain. I would be very surprised if DCS would model the ground wave. Probably only the sky wave is modelled and terrain blocking is not taken into account at all. https://en.wikipedia.org/wiki/Radio_propagation#Surface_modes_(groundwave) 1
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