I’ve been seeing some threads asking for instruments (3d party is available already-see @epaga s excellent stuff) as well as a “split LOC/GS button, smooth autopilot transitions and “navigation modes on HUD” I figured I’d post my first feature request since some of the stuff I’ve been seeing isn’t all necessarily exclusive of each other in theory of course. I tried to blend the ideas into one topic and while I always think the sky is the limit, I have NO idea how to code so color me a dreamer I guess.
The feature request is a
Flight Director with “armable” modes
(which I believe could assist with manual flying as well as Autopilot “smoothing”)
Mind you I’m trying to keep this idea as simple as possible for dev purposes should it happen. Again, the flight director cues could actually help smooth out the autopilot in a way where it would CAPTURE the current state (climb/descent/bank etc) before proceeding into it’s active mode so to speak
-As to the autopilot smoothing:
•First, if the pilot is following the flight director, the autopilot should engage without any dives, Climbs or other yanks and banks…
Upon autopilot engagement the F/D if NOT being followed would momentarily capture the current aircraft state in regards to V/S, lateral mode and ALT requested and then gently swing the aircraft into the commanded modes.
-the cue could be the FPV style or crossbar style-FPV probably being easier to achieve.
-On the ground, takeoff/runway mode would be armed once the engines are switched on or the aircraft enters the runway.
-You’d get a lateral command based on runway heading or selected autopilot heading as well as a pitch command for takeoff-perhaps having per aircraft pitch indicia as well to avoid tail strikes say 15* nose up for a general idea.
-Once you lift off, your set autopilot speed number (remember the AP is still OFF) would give you pitch for speed. A-la Airbus SRS and Boeing T/O modes. After hitting XXX’ AGL, the director would give you a pitch for vertical speed/maintain 250kt.
-The pitch for speed could be blended out after 400’ AGL to either work with one of the 3rd Party VNAV apps (which I’m sure will be more mature by the time this happens if ever) or go into the current vertical speed or gently into a pilot selected vertical speed.
-NAV or HDG could be PRE ARMED to kick in once you hit 400’ AGL and would kick in lateral guidance based on your FPL.
-On landing, once the ILS approach is selected (say for instance *ILS25L KLAX)
you’d receive lateral guidance for the localizer separately from the glideslope UNTIL the glideslope is captured or one dot below, then you’ll get your vertical guidance as well. (This goes to the split LOC/GS button feature request)
-I’m not sure how the autothrust would work with this but it sure would be interesting to see if we could get T/O, CLIMB and CRUISE modes based on the flight director-but that’s for another day.
Below are some pics of Boeing and Airbus takeoff modes where the flight director commands pitch up and runway track etc as well as NAV and ALT capture along with a link to Airbus FMA modes (which basically tell the flight director where to direct as it were)
Boeing FMA/Flight Director on takeoff
Boeing Flight Director with LOC/GS “armed”
Airbus Flight Director/FMA Capturing NAV
I’m not real sure about formatting and such and I’d like to link back to a few threads which I’ll attempt to do but forgive me if it takes a minute.
Would love to hear thoughts on this topic. Clearly it would work for any A/P in any plane. Perhaps it could even help with refueling?
Somewhat related to these topics: