autopilot -- stick shaker?

[bbtapb]

Was thinking about the EAA contest for reducing LOC accidents..

Wondering if Dynon's autopilot might be able to have a stick-shake mode when not over a runway and exceeding maybe 10 degrees AOA.

Sure, there are 3rd-party add-on devices. But, it seems to me you can do this with the autopilot servo, no new hardware, and a bit of new software.
Also, I think this might be an advantage over the Garmin servos, which use a big clutch.

Thoughts?

 

[Schorsch]

Love it! For those without the AOA pitot probe, maybe use a software approximation of critical AOA?

 

[Garrett]

Sign me up!

 

[Jonas]

isn't the increasing beeping intensity and then the single tone in the headset good enough?
(Without the AOA probe, it won't work.)

 

[airguy]

I would prefer an audible (TERRAIN TERRAIN) warning with a silence option than a stick shaker. My primary runway is unlisted and shall remain so, the stick shaker to me is more intrusive than an aural alert, though both have the same effect.

Our 172 gives a (TERRAIN TERRAIN) alert followed by (PULL UP PULL UP) if I don't correct, unless I silence it with an inhibit button. Works great for operations at regular airports, just use the inhibit button for home base, just like we intended.

 

[bbtapb]

I'd like that, too. It's an answer to a different problem/question, though.

 

[lolachampcar]

Aerobatics are enjoyable in addition to giving you a no instruments feel for your aircraft. If I get distracted landing, it is nice to have an absolute feel of the stick understanding of energy and air speed.

Safety is a good reason to go have some fun flying up side down. Stick Shaker not required

 

[bbtapb]

Re: autopilot -- stick nudge? (was shaker..)

Lola,
The idea in this case is to nudge the stick in the direction away from killing yourself by a stall/spin near the ground.
The proposed idea doesn't have anything to do with aerobatics (though of course I agree such is good for feel of the airplane) but has a lot to do with distraction.  Many airplanes don't give much warning before stall, and this idea, if feasible, would help reduce the prevalence of stall/spin accidents in airplanes that are susceptible to them.

 

[mmarien]

Audio warnings work well for me although I've never heard the AOA audio ever. I've calibrated it a couple of times, but I think it needs more work. I do pay attention to the flaps overspeed warning and the 500 foot announcement on approach. Perhaps an audio warning when the plane is at or below approach speed and exceeds a rate one turn or the ball is out. Both indications of possible stall/spin on approach but I don't think either will trigger an AOA warning.

 

[vlittle]

There is likely to be a definitive answer on the *best* way to indicate AoA and stall warnings coming from the FAA in the near future.

We (a company I am involved in) have sold the FAA several primary control devices that can emulate airframe forces and haptic feedback. Their intent is to do a scientific study on training outcomes and I hope that this will give us good data.

This reinforces my belief that whatever system you like, proper training may be the key to using it effectively. We'll get the data and see where it leads us.

Vern

 

[dynonsupport]

Suggest you test your SkyView display audio output to insure that it's wired and configured correctly. When you get into the AUDIO SETUP, the display is outputting a repeating "Dynon Avionics". If you don't hear that in your audio system, the SkyView display's audio output is not wired correctly, not configured correctly, or malfunctioning. Do this on EACH SkyView display.

Audio warnings work well for me although I've never heard the AOA audio ever. I've calibrated it a couple of times, but I think it needs more work. I do pay attention to the flaps overspeed warning and the 500 foot announcement on approach. Perhaps an audio warning when the plane is at or below approach speed and exceeds a rate one turn or the ball is out. Both indications of possible stall/spin on approach but I don't think either will trigger an AOA warning.

 

[bbtapb]

Re: autopilot -- stick nudge? (was shaker..)

Sorry, I didn't mean just to shake the stick, but to nudge/pulse it forward to help avoid a stall, like some cars now do to keep your lane.

 

[rlallen1]

Pretty sure garmin has this technology in their G3X touch.

 

[mmarien]

Suggest you test your SkyView display audio output

I do get other audio from Skyview and checked to make sure that AOA audio was on. The AOA display also works. I just checked through my screenshots and see that it loses a few bars at lower speeds. Maybe I should spend some time on it again. Good excuse to go flying.

 

[bbtapb]

Autopilot -- stick nudge

Ryanallen, No. What Garmin has is an option to automatically engage the autopilot if you totally lose it.

Rather than an emergency-only device, I was thinking of something more potentially involved in casual maneuvering.

 

[mmarien]

I finally got a couple of chirps out of my AOA audio today on a tough landing 25G35. I also seen on another post that the start of the AOA audio can happen at different positions on the AOA display. I probably have it starting on the yellow/red border. :-[

 

[airguy]

I finally got a couple of chirps out of my AOA audio today on a tough landing 25G35. I also seen on another post that the start of the AOA audio can happen at different positions on the AOA display. I probably have it starting on the yellow/red border. :-[

If you want the audio for the AOA to start a few knots faster, recalibrate it per the standard AOA calibration routine, but don't go all the way to a full stall. Pull the speed back to 3-4 knots above full stall then recover and hit the "stall" button on the AOA, you've now calibrated it to be sensitive to a pre-stall condition rather than a full stall. I did this on mine because I wanted the audio chirp to give me just a few more knots cushion for the "Whoops, wasn't paying attention" scenario in slow flight.

 

[mmarien]

Thanks airguy. I'll give that a try.

 

[jc2da]

Yes, I did the same thing. I dont think i used flaps at all and just kept my flaps up on the configuration.

For me, having the chirps is key to its utility, at least for me. Chirping is a reminder that i am getting close. The level of chirping tells me where i am in the range. I have a mechanical stall switch as well, but that is a binary switch. One or off. Not nearly as useful as the chirps.

I do pay attention to the flaps overspeed warning and the 500 foot announcement on approach. Perhaps an audio warning when the plane is at or below approach speed and exceeds a rate one turn or the ball is out. Both indications of possible stall/spin on approach but I don't think either will trigger an AOA warning.

Skyview doesnt have a 500 ft announcement though, right? That must be coming from another box, i believe?

 

[mmarien]

Skyview doesnt have a 500 ft announcement though, right? That must be coming from another box, i believe?

Yes you're right, it comes from my Garmin GPS.