Thanks for the quick reply.
Current video gear is 900mhz using ch.1 910mhz.
I have 2 commercially made patch antennas (DPCAV) and the Oracle. No tracker.
Plus various commercial 900mhz "ducky" antennas and di-poles. (never use 'em)
I mainly (so-far) just use the 2 patch's with the Oracle, but have not tried any great distance with that setup. (3500 ft. so-far, signal good)
Would you recommend the patch (or the Bi-Quad) to be flat on the van roof, or angled in the direction you plan to fly?
I'm guessing flat for close in flying, and angled when you want to possibly go farther out.
Edit; all GS gear powered from the van battery.