Jim Weir of RST engineering has written a booklet that he sells for $5 USD. In it he discussed everything you need to make antenna for aircraft. The articles are not published on the web. His web site, where you can order the booklet is www.rst-engr.com As far as I know all VOR antenna are V pole antenna. I think that the V is significant, though I'm not qualified in Radio electronics. All of the antenna sold by the verious aviation suppliers seem to be of that shape. I think that you were asking if the balun has to be vertical or can it be horizontal. my copper foil antenna is glued to the bottom exterior of my fuselage and the balun is laying on the bottom skin on the interior, without reguard to orientation. It seems to work ok.
Orma
