Jeff Edwards wrote:

>>>Here is what has worked well in my aircraft.

 

Xpdr-- AEA non ground plane antenna in vertical tail

Com 1-- COMANT whip on belly

Com 2 AEA non ground plane mounted vertical in vertical tail

Nav 1/ GS (work on splitter) -- Bob Archer in Left fiberglass wingtip-- (will not work in carbon wingtip)

GPS 1 & 2 -- on top of radio stack under glareshield

Mrkr Bcn  copper strip antenna in fiberglass wing root fairing

 

NAV antennas will not work well mounted vertically

 

As you can see-- I have only one visible antenna.<<<

Great information, Jeff.  It was too late at night writing my email.  It should be that my COM2 would be in the vertical stab.

I know about COMANT, but who is AEA?  Is your COM2 antenna essentially the type that is described in the Lancair assembly manual?  Do you have a picture of your arrangement of antennas in your vertical stab?  I'm really interested in the Xpdr antenna?

I think I will be happier with redundant GPS antennas than have a need for two NAV antennas.  Do you have any trouble with servicing your radio stack with the GPS antennas under the glareshield?

How about your ELT antenna?

And finally...I'm still pretty lost on a NAV antenna, even one, on a IV-P with carbon fiber wingtips.

Barry Knotts
LIV-P, Conti TSIO-550