Adding a second CDI/GS

[MP]

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.

[Ben Jackson]

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/

[MP]

(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.

[Tri Pacer Pilot]

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.

[Windecks]

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.
>
>