Adding a second CDI/GS

We have a Garmin GNS430, UPSAT SL30 NAC/COM and Sandel EHSI. I'd like to
add a second course deviation indicator/GS for when Murphy shows up and the
Sandel quits at the worst possible time.

A couple questions for the avionics gurus on r.a.o:

- How much is this going to cost? There's the cost of the instrument,
whatever switches and annunciators are needed, and maybe 8 shop hours for
installation and checkout. I'm guessing about $3k for the lot. Is that
realistic? Anything else?
- Can I switch the indicator between the 430 VOR/LOC/GS and the SL30 NAV
inputs?
- Is it very difficult/expensive (or worthwhile) to add the GPS deviation
info to the second indicator? We have an MX20 to use as a moving map while
setting the GNS430 display to CDI mode.

Thanks in advance for some free advice.

In article ,
MP wrote:
We have a Garmin GNS430, UPSAT SL30 NAC/COM and Sandel EHSI. I'd like to
add a second course deviation indicator/GS

Don't the 430 AND the SL30 have builtin graphical CDIs? Good enough
for emergency purposes.

If you add a second CDI you should be able to drive it in parallel
with the HSI.

--
Ben Jackson

http://www.ben.com/

(Ben Jackson) wrote in news:NDLkb.319561$mp.258797
@rwcrnsc51.ops.asp.att.net:

In article ,
MP wrote:
We have a Garmin GNS430, UPSAT SL30 NAC/COM and Sandel EHSI. I'd like to
add a second course deviation indicator/GS

Don't the 430 AND the SL30 have builtin graphical CDIs? Good enough
for emergency purposes.

If you add a second CDI you should be able to drive it in parallel
with the HSI.


They do have CDIs, but no GS indicator, so for VORs and LOC they could do
in a pinch. Also, they are off to the right in the panel, and are not in
the normal scan path. We have an unused standard cutout right next to the
HSI, a good place for a second indicator.

MP,

I did that in my Tripacer, have a GNS430 and Sandel and KX-125. The backup
indicator is a KI-209A. I had a couple of interesting moments because the
209A has a 'localizer' mode that is dependent on a LOCENGAGED low signal
that switches the TO/FROM flag to TO. The 430 doesn't really put this out
correctly. We got around it by tying it to the GPS/NAV switch.

I also had to use the P6 connector of the 430 for my nav output to the 209,
through a NAT 8pole relay.

So, let's see ....

NAT Relay - $160
KI-209A - $895
Switch and Light - $50
Avionics shop time - 3 to 4 hours
Redundancy - priceless.

Hope that this helps,

Rod Wagoner
Tucson, AZ

MP wrote in message ...
We have a Garmin GNS430, UPSAT SL30 NAC/COM and Sandel EHSI. I'd like to
add a second course deviation indicator/GS for when Murphy shows up and the
Sandel quits at the worst possible time.

A couple questions for the avionics gurus on r.a.o:

- How much is this going to cost? There's the cost of the instrument,
whatever switches and annunciators are needed, and maybe 8 shop hours for
installation and checkout. I'm guessing about $3k for the lot. Is that
realistic? Anything else?
- Can I switch the indicator between the 430 VOR/LOC/GS and the SL30 NAV
inputs?
- Is it very difficult/expensive (or worthwhile) to add the GPS deviation
info to the second indicator? We have an MX20 to use as a moving map while
setting the GNS430 display to CDI mode.

Thanks in advance for some free advice.

Thanks for the advice. I was afraid we were going to get locked into the
Garmin (read expensive) indicator. Maybe we can get it done for under $2k,
your way. Cool.

OBTW, a big AMEN on redundancy.


"Tri Pacer Pilot" wrote in message
ink.net...
MP,

I did that in my Tripacer, have a GNS430 and Sandel and KX-125. The
backup
indicator is a KI-209A. I had a couple of interesting moments because the
209A has a 'localizer' mode that is dependent on a LOCENGAGED low signal
that switches the TO/FROM flag to TO. The 430 doesn't really put this out
correctly. We got around it by tying it to the GPS/NAV switch.

I also had to use the P6 connector of the 430 for my nav output to the
209,
through a NAT 8pole relay.

So, let's see ....

NAT Relay - $160
KI-209A - $895
Switch and Light - $50
Avionics shop time - 3 to 4 hours
Redundancy - priceless.

Hope that this helps,

Rod Wagoner
Tucson, AZ

MP wrote in message ...
We have a Garmin GNS430, UPSAT SL30 NAC/COM and Sandel EHSI. I'd like to
add a second course deviation indicator/GS for when Murphy shows up and
the
Sandel quits at the worst possible time.

A couple questions for the avionics gurus on r.a.o:

- How much is this going to cost? There's the cost of the instrument,
whatever switches and annunciators are needed, and maybe 8 shop hours for
installation and checkout. I'm guessing about $3k for the lot. Is that
realistic? Anything else?
- Can I switch the indicator between the 430 VOR/LOC/GS and the SL30 NAV
inputs?
- Is it very difficult/expensive (or worthwhile) to add the GPS deviation
info to the second indicator? We have an MX20 to use as a moving map
while
setting the GNS430 display to CDI mode.

Thanks in advance for some free advice.