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ericmarciano avatar image
ericmarciano asked FlyingRaccoon commented

Autopilot on ground

Hello,

Using the Asobo 747 and A320, I noticed the autopilot cannot be engaged on the ground. Pressing the CMD button (in 747) or AP1(in A320) has no effect, which is confirmed with the SimVar Watcher: the AUTOPILOT MASTER simvar value is always 0.

On the other hand, it works fine with the Cessna Caravan, I can activate the AP on ground, the light runs on and the simvar is set to 1, everything is OK.

I can't understand this difference. Of course I saw the min_feet_for_ap setting in systems.cfg, but for all these planes it is not defined, which means it takes the default value of -1000, which menas it is disabled. To make sure, I added the line: min_feet_for_ap=-1000 in my aircraft systems.cfg and it didn't change anything, the autopilot still can't be activated on the ground.

Do you have any explanation? Did I miss something?

Thank you.

gauges
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FlyingRaccoon avatar image
FlyingRaccoon answered

Hello @ericmarciano

In systems.cfg, you also want to look for min_flight_time_for_ap which is set to 5 seconds for the A320 for example.

Regards,
Sylvain

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ericmarciano avatar image
ericmarciano answered

Indeed, that did the trick. It now works as expected.

Thanks again for your great help !!

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ericmarciano avatar image
ericmarciano answered FlyingRaccoon commented

Now that it works, I have another question about the autopilot on ground:

Is there a way the autopilot can steer the aircraft on the ground while keeping the wings level?
(this is for automatic rollout mode)

What I saw since now is the autopilot using mainly the ailerons to make the aircraft turn, which is not appropriate when rolling on the ground...

Thanks.

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ericmarciano avatar image ericmarciano commented ·

I saw rudderGroundPID in ai.cfg is supposed to adjust controls on the ground to stay on the centerline when using autopilot control, but I don't know how to activate this control mode.

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FlyingRaccoon avatar image FlyingRaccoon ♦♦ ericmarciano commented ·
No, we don't have any AP mode for this at the moment.

The rudderGroundPID will only apply to runway centerline.

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