> Thinking of most GA and business aviation aircraft I know the NAV > antenna (VOR/LOC/GS) is always located on the vertical tail, just below > the horizontal tail with a cross or t-tail and on top of the vert. tail > with a low hor. tail. These are usually two antennas, one on each side > of the structure. They are on the vertical tail because NAV signals are > polarized horizontally and thus the antenna must be installed that way > (unlike COM which is polarized vertically and you will find these > antennas standing up or down.)
Thanks, I didn't know NAV is polarized horizontally (which makes sense given the need for an elevated pattern). I've been doing some reading about ground VOR equipment, and it seems there are 3 main types. Terminal VOR - around 50 W ERP, service radius approximately 25 miles under 12000 feet Low altitude VOR - power output unknown, range 80 miles under 18000 feet High altitude VOR - around 200 W, range 200 miles above 20000 feet I got this information from the book "Aviator's guide to GPS" by Bill Clarke. Other sources on the internet which seem particularly reliable to me, mention a standard setting of 100-130 W with a maximum power of 200 W, which is set based on local site surveys. Cheers, Adrian ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
