Autobrakes Problem (Video)

[dongjin2]

The autobrakes.

It is working when nosewheel touch on ground

but if i set reverse thrust before nosewheel touchdown.

It's not working.

 

 

 

You think when reverse IDLE makes Disarm autobrakes.

But That's Wrong,

When I tested AUTO 1, 2, 3, MAX, with reverse,

It is same rate of decreasing.

That means the auto brakes not working,

Edited July 4, 2021 by dongjin2

[Litjan]

The autobrake system is working fine for me. Make sure that you don´t accidentally toggle them off by applying (manual) brakes.

The autobrake system is supplied by X-plane logic, it is not a custom system. Deceleration rates are correct, though.

Make sure to not accidentally disarm the autobrake by toggling the (manual) brakes.

Cheers, Jan

 

[dongjin2]

18 hours ago, Litjan said:

The autobrake system is working fine for me. Make sure that you don´t accidentally toggle them off by applying (manual) brakes.

The autobrake system is supplied by X-plane logic, it is not a custom system. Deceleration rates are correct, though.

Make sure to not accidentally disarm the autobrake by toggling the (manual) brakes.

Cheers, Jan

 

I think x-plane recognize the airplane touchdowned when Nose gear touchdown on the ground, Then the autobrakes working.

 

 

Situation.1 (Nosegear touchdowned)

//Nosegear touchdown -> On ground data ref- > Autobrakes working. = (Because Nose gear on the ground, so x-plane recognized as the airplane on the ground)

 

 

Situation.2 (Only main gear touchdowned,)

Nosegear NOT touchdowned Yet -> Reverse -> Autobrake Disarmed =  (Because of applying REVERSE THRUST When x-plane recognized as the airplane ON THE AIR,) 

 

 

So, Just I want to know 

 

How to make the autobrakes working when on the main gear touchdowned ( not nose gear)

Edited July 5, 2021 by dongjin2

[Litjan]

Hi dongjin2,

we use the standard X-Plane model for the autobrake. If it does not allow autobrake operation before the nosewheel touched down - therefore this is not possible with the IXEG 737, either.

You could file a bug report with X-Plane to get the autobrake behaviour changed.

Correct piloting technique for the 737 is to use spoiler on touchdown (autospoiler deploy, backup manual spoiler deploy), then derotate, then apply reverse thrust. The autobrake will also have a (short) delay before it activates, otherwise the nose would slam down.

You are correct that the system behaviour is not exactly as in the real plane.

Cheers, Jan