Approach ATC

[bond672]

Hi all,

 

I just wanted to check, is approach auto throttle only working with half flap or full flap?

 

I want to use it for a while until my approaches are better.

 

Thanks in advance

 

Simon.

[=4c=Nikola]

It doesn't work.

[Nyteshayd]

ATC is just cruise control in the bug. Unfortunately you will need to learn to saw.

[Swift.]

ATC is just cruise control in the bug. Unfortunately you will need to learn to saw.

 

For now, in the real thing there is an approach mode that gives throttle to hold AOA.

[bond672]

Hmmm

 

The Grim Reapers did a video using approach ATC, it was holding on speed AOA which is what I want, but it would only work on half flap.

 

Simon

[Razor18]

How can throttle hold AoA? You trim to on speed and it stays there regardless of throttle, doesn't it? At least in the landing speed range. Or?

[bond672]

You control pitch and roll with the stick, the AOA and speed is controlled by ATC.

 

That's my understanding, I will try this afternoon lol

[CBStu]

You control pitch and roll with the stick, the AOA and speed is controlled by ATC.

 

That's my understanding, I will try this afternoon lol

In a landing approach pitch is controlled by trimming to AOA. Roll controlled by the stick. Descent rate controlled by the throttle.

[kengou]

I’ve heard atc works with half flaps but never tried it. But considering you shouldn’t be landing with half flaps anyway it seems pointless to practice like that.

[Razor18]

"ATC Approach Mode.

The ATC approach mode is engaged by pressing and releasing the ATC button on the left throttle with the FLAP switch in HALF or FULL and the trailing edge flaps extended at least 27°. When ATC is engaged in the approach mode, the flight control computer modulates engine thrust to maintain on-speed AOA. The computer uses inputs of AOA, normal loadfactor, stabilator position, pitch rate, and angle of bank to generate command signals."

 

Based on this, I guess after you trimm to on speed AoA, and switch ATC on, then you CAN pull or push on the stick, and throttle will try to regain on speed AOA. Meaning if you pull on stick, AoA increases (E-bracket moves down), but ATC will push up throttle to lower AoA back to set value. And opposite, if you push the stick. Just a guess, but can hardly imagine any other way.

[VFA41_Lion]

It only works on half flaps at the moment. ATC logic won't take into account full flaps and still makes thrust adjustments based on half flaps

[bond672]