Hi. I’m going to install in my experimental G5 with GAD29B.
However there is S-tec 50 with s-tec gpss module installed and standard directional gyro (vacum).
G5 require to be connected to S-tec 50 configured for KI-525A. I have manual how to modify sys50 to GPSS converted by removing/exchanging some resistors but seems that now I need manual how to convert it to KI525. Anyone can help?
Other (better) option is to modify original s-tec gpss converter to work with G5 (only heading bug I need). This converter works pretty well and I would like to keep it for gpss however I expect that it will not accept KI525 specific signal from gad29b as now its configured to work with DG (or it will?).
Can someone help me with this?
Ditch the STec GPSS adaptor as the G5 can be selected to provide the GPSS steering signal. Reconfigure the STec 50 to accept the KI525A input from the GAD29b. This is the cleanest installation and keeps it simple.
Hello. Thank you for answer. I like this s-tec gpss-heading butting – its easy to swap.
Anyway, to modify s-tec to ki525a I need next drawing with required resistors. I have only drawing how to go to GPSS but not back – can anyone help ?
Here you go
I have an Stec 60-2 and I installed a G500TXi. I kept my Stec 901 GPSS. I did this for several reasons. If the G500TXi goes dark, I can still command my autopilot from my GTN750/GPSS where the Stec 60-2 is in heading mode. I won’t have vertical guidance, but will be able to fly the lateral path of any RNAV (GPS) approach. The Stec GPSS does a better job of matching up with my Stec 60-2. The user interface is easier than making a change on the G500TXi.
Correct, at G5 swapping between hdg/gpss is complicated. They could make analog input for switch/button..
The problem with external GPSS switching is that the HSI could be displaying Nav and yet the autopilot is coupled to GPS – not good for situational awareness. In an ideal world you should only be able to couple to the same source that you’re displaying.
wigglyamp wrote:
The problem with external GPSS switching is that the HSI could be displaying Nav and yet the autopilot is coupled to GPS – not good for situational awareness. In an ideal world you should only be
Thats also true. Ok, at system 50 when it’s in nav then its 100% nav only you can mix hdg/gpss modes what happened to me already a few times but I have this stec switch next to attitude and its clearly visible. Other problem with st901 was that it wasn’t 100% accurate – it was flying sometimes off-track a bit. Perhaps with g5 it can be tuned. Only this fact that I have to enter menu, find gpss and click it makes me sad…
wigglyamp wrote:
The problem with external GPSS switching is that the HSI could be displaying Nav and yet the autopilot is coupled to GPS – not good for situational awareness. In an ideal world you should only be able to couple to the same source that you’re displaying.
Only the pilot police would insist on that. It is one reason I don’t like the Garmin GPSS because it blocks that very mode of operation. Yet in the US,one can couple the autopilot to the GPS via GPSS and display VLOC on the indicator on a VOR approach as outlined in the US AIM. That satisfies the requirement to monitor the VOR guidance,
I thought the system 50 has to be configured for the GPSS system, and the gpss unit had to be configured for the proper HSI or DG
( but I could be mistaken with another GPSS system)
