STEC 50 AUTOPILOT SENSITIVITY MANUAL
STEC 50 AUTOPILOT SENSITIVITY FULL

The roll center adjustment is an attempt to remove the TC bias. So it flies straight and level 1/2 a dot out (for example) If the autopilot is not tracking the center of the heading bug or nav deviation line there is an adjustment via the front panel.ДЇrom my experience the rate based turnВ stabilization from the Turn Coordinator can have a little bias in the signal, without the roll center adjustment the PID loop fights between the TC's biasedВ signal (turn, turn) and the NAV deviation (go the other way) and the two signals cancel each other out at some level of NAV deviation.

STEC 50 AUTOPILOT SENSITIVITY MANUAL

See the STEC Service manual section 2 'Roll Centering' That would be another place where you want to tell the AP to go into the APR sensitivity +GS capture mode.Д¬an you explain more about this process? I never heard the term вЂњroll centering zeroвЂќ. I'll also check to see if the 'LOC' line is enabled for RNAV approaches. If your installation is not going directly into APR mode from NAV we would have to consult the wiring diagram for your radio.ДЇor the VTF -> Localizer intercept (outside of 50% deviation) holding HDG while pressing either NAV or APR should keep the current intercept angle and arm NAV capture. The G1000 wiring diagram does indicate this line is also connected. I have the G1000 installation, and I don't remember if it does that sequence automatically, I will see the next time I'm up. (I was used to hitting the APR button)Д¬hecking the wiring diagrams, there is a LOC (enable) line, where the nav radio tells the AP that the NAV is sending a LOC signal, so the 55X goes into APR mode automatically when sensing LOC. I've just re-read the Stec 55x manual, and it implies that if you are on a localizer/ILS that the system will automatically go into APR mode. I guess that situation has just not come up in my flying. IвЂ™ve never actually used the feature, but as I understand it, you would press HDG and NAV simultaneously if you wanted the system to keep you on your current heading until intercepting the nav course, which I guess would be useful if you were way beyond full-scale deflection and needed to keep that same heading for quite awhile before getting back on Nav course. I donвЂ™t hand fly vectors cuz there are so many other things IвЂ™m taking care of in this phase of flight. If youвЂ™re hand-flying the vectors, then yes, perhaps youвЂ™ll need to press NAV first and then APR. Once you get established on the localizer, you should just be able to press the APR button and it will determine the best angle to use, capture the localizer and then the glideslope. If youвЂ™re on VTF, then you are already in heading mode (assuming youвЂ™re using the heading bug to follow ATC guidance). Correct?ДЇor some folks who are used to other AP's like the Kings or even Airbus/MDC/Boeing types this is very confusing as APR is usually the mode for both loc and gs. 'Fly Heading 120 to intercept the localizer'.ДЇor me, in this situation, you'd have to press NAV and HDG simultaneously (plus whatever vertical mode you need) and not APR/HDG. However, let's say you are on vectors to final. Just like you, other than the management of the glideslope, I have no idea why the APR button exists. It sounds like you are using it correctly. On a VOR approach though it appears the APR is used to activate the approach. What it appears to me is that the APR button on the 55X is only used on a precision approach to able or disable the glideslope if you need or want to. To fly a precision approach, I am in HDG and ALT mode and all that I need to do is hit the NAV button for the glideslope intercept. I have the 60-2 and I donвЂ™t have the APR button. I read the 55X manual and it was an interesting read. For me, it has worked like that, but some folks tell me that I would have to press the APR button. I am particularly interested in the function of the NAV and APR buttons on the AP controller.

STEC 50 AUTOPILOT SENSITIVITY FULL

Once established on LOC, the GS will only arm if you are in ALT hold, loc is established and you intercept from full deflection below. AP determines by itself it is tracking a LOC? (How?) The AP should display NAV/APR and ALT at this stage. On intercept course to the LOC press the NAV button once to arm NAV/APR mode (NOT the APR button). We had a discussion here about the correct way to intercept and capture an ILS on the STEC 55x, as the manual is not very clear on this.ДЄs far as I understand the manual, the procedure is like this:

Stec 50 autopilot sensitivity