I have a backup too.

As primary I use a Zander GP941 and as secondary I use a CAI GPSNAV 10.

It is important that the secondary FR is a different make than the
primary. The most likely reasons, after installation and power supply,
for a FR not working properly are design and production.

Use two independent power supplies for the two FRs. By independent I
mean that there is no common element in the power supplies, not even a
common switch, fuse or .... .

The two antennae should be separated by at least 20 cm.

You ought to be able to use both FR as means of navigation. So you need
also two different navigation displays; again not the same make and not
the same software.





Fox Two schrieb:
Hello All,

I'm new to racing, and I have a new D-2b on order from Germany. I'm
considering installing a backup Flight Data Recorder (FDR) to my
Cambridge 302, and I'm curious to see how many other competition pilots
choose to have a backup FDR as well. What kind of backup FDRs do you
use?

Thanks in advance for any advice you have!

Chris Fleming, 'F2'
El Paso, Texas