400a autopilot to Century Non-slaved HSI

[rmorris]

I'm getting a bunch of avionics finally swapped out
- Century non-slaved HSI
- dual KX155 w/GS one to a KI-209 and the other to the new (to me) Century HSI
- KLN 90B w/annunciator
- King DME

taking out old nav/comms and Loran, but keeping the ADF (still works

Here's the set-up....the guy doing the work says he is having problems figuring out the 400a to the HSI. Apparently it gets its info from the old DG (then there is a little know on the control unit where you set the heading you want it to fly). So he tells me today that he wants to put the DG back into the plane just to have it hooked up to the autopilot. My main concerns: 1) I would like to have it hooked up to the HSI like the other new stuff, 2) would like to have that empty hole avail for when I can finally afford to add an engine monitor, and 3) if I am going to have something redundant, it would not be dg (already have a magnetic compass for that redundancy...would put another gauge there, like electric AI).

Here's the question....
- anyway to hook-up the 400a to the Century HSI so it will get it's heading info from there, or even better to get the direction from the heading bug on the HSI ??
- anyway to just replace the 400a control unit (with that little heading knob) with a newer 400 (or something compatible with all the other stuff like servos, etc) ??
- any other good alternatives ??

-Robert
rmorris@agsi.us
________
Medical marijuana

[Pete Somers]

Robert
Let me know the Skymaster you have, if the a/p IS a 400A. and what is the p/n of the HSI installed. Then I can help you.

Cheers
Pete

[rmorris]

Originally Posted by Pete Somers

Robert
Let me know the Skymaster you have, if the a/p IS a 400A. and what is the p/n of the HSI installed. Then I can help you.

Cheers
Pete

1968 T337C 337-0775, N2475S
a/p is a Navomatic 400, not sure now about the 'a'. Thought it was until you questioned it ...it's the one with the little heading knob on the a/p control unit itself, so you control what heading you want it to fly by turning that little knob, and supposedly it then correlates to the heading on the DG...attached is a pic of the control unit
The Century HSI is:
NSD-360 HSI S#1191E
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JUSTIN BIEBER FAN

[Pete Somers]

Robert
Your Avionics Guy is correct. The heading information comes from the DG on the Navomatic 400 system and you cannot hook up a external DG to this system.
The control unit is part of the 400 Navomatic system.

Pete

[rmorris]

Originally Posted by Pete Somers

Robert
Your Avionics Guy is correct. The heading information comes from the DG on the Navomatic 400 system and you cannot hook up a external DG to this system.
The control unit is part of the 400 Navomatic system.

Pete

OK, you need to work on how you deliver bad news

Seriously, any thoughts (Pete or others) on any other options. Go out and upgrading to an STEC 50 is not really an option for me (just had to pay to replace the rear engine, and now for getting all this avioics work done, not to mention a TON of other items, all since last September).
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Avandia Heart Attack

[Pete Somers]

Robert
There is no way around this, I went thru the same thing and could not find an answer, the DG has to go back into the system, so we installed it in the right panel and piped it up to the vac.
At least you have a spare DI and you will still have to remember to reset it.

Cheers
Pete