The FSX autopilot is quite capable and does a nice job of capturing NAV radialsand Approach guidance beams.Is there a way of detecting at what point the autopilot switches from NAV ARM toNAV Coupled and APPR ARM to Approach coupled?If Heading mode is engaged, I could detect the HDG lock coming off, I guess,but that only works with HDG engaged..I'm trying to set up an annunciator that works like the Bendix King versionwhere the ARM indication displays correctly.

The FSX autopilot is quite capable and does a nice job of capturing NAV radialsand Approach guidance beams.Is there a way of detecting at what point the autopilot switches from NAV ARM toNAV Coupled and APPR ARM to Approach coupled?If Heading mode is engaged, I could detect the HDG lock coming off, I guess,but that only works with HDG engaged..I'm trying to set up an annunciator that works like the Bendix King versionwhere the ARM indication displays correctly.

Hey Bert,in the way I understand your question I believe you have answered it yourself already. :( When you are holding a certain intercept heading with HDG mode active, and NAV armed, NAV will change from armed to active when HDG disengages.Same story though for APP mode. Say you're on your final intercept altitude before G/S capture, holding that with ALT mode, and APP is armed (say HDG is already off, so the LOC part of the APP is already active), then ALT will come off once G/S is in capture range.Now that is basically what you're already discovered. :( I feel there's no other simple way to determine when the change occurs.Are you talking about a Bendix KAP 140 style A/P? Haven't flown one of those quite a few months now... But a simple thought would be, any 'armed' light would have to remain illuminated as long as the respective other mode is still active. So assume you press HDG and NAV, then NAV should be 'armed' as long as HDG is still on, and FS actually takes care of that, as long as you're not building a fully custom A/P. Just a quick thought, could be completely wrong and pointless. :( RegardsEtienne

Hey Bert,in the way I understand your question I believe you have answered it yourself already. :( When you are holding a certain intercept heading with HDG mode active, and NAV armed, NAV will change from armed to active when HDG disengages.Same story though for APP mode. Say you're on your final intercept altitude before G/S capture, holding that with ALT mode, and APP is armed (say HDG is already off, so the LOC part of the APP is already active), then ALT will come off once G/S is in capture range.Now that is basically what you're already discovered. :( I feel there's no other simple way to determine when the change occurs.Are you talking about a Bendix KAP 140 style A/P? Haven't flown one of those quite a few months now... But a simple thought would be, any 'armed' light would have to remain illuminated as long as the respective other mode is still active. So assume you press HDG and NAV, then NAV should be 'armed' as long as HDG is still on, and FS actually takes care of that, as long as you're not building a fully custom A/P. Just a quick thought, could be completely wrong and pointless. :( RegardsEtienne

Hi Etienne,Yes, that is what I ended up doing and it seems to work alright.

<Element><Visible>(A:Autopilot Nav1 Lock,bool) (A:Autopilot Approach Hold,bool) or (A:Autopilot Heading Lock,bool) and</Visible>	 <Position X="0" Y="0"/>	  <Image Name="ARM_ON.bmp" /></Element>

I was wondering if the FSX autopilot provides more specific event feedback - but this is OK.Yes, it is a vintage Bendix King autopilot.. KFC 150.Thanks for your reply!

Hi Etienne,Yes, that is what I ended up doing and it seems to work alright.I was wondering if the FSX autopilot provides more specific event feedback - but this is OK.Yes, it is a vintage Bendix King autopilot.. KFC 150.Thanks for your reply!

Hey,can't quite help you with the XML since I am more into C gauges if anything at all. :( If you check the available Token Vars and similar documents though, I am pretty sure you will not find more detailed or more functional solutions, so you might be well off using this method.Good luck with your project! Is this going to be a single gauge or for a specific panel?

Good luck with your project! Is this going to be a single gauge or for a specific panel?

Carenado Bonanza - wonderful airplane - just needs some tweaking :(