Hello,

 

Im making some training of engine failures at T.O.As you may know,the correct procedure for trimming the rudder is to make rudder input until the control column is level, then trim.

 

The problem is that the control column doesnt animate correctly, or at least I dont know if there is a way for it to animate correctly. After engine failure the control column is displaced to the side of the operative engine and when I make the rudder input it doesnt level. Anyone knows the solution to this problem ?

 

 

Thank you very much.

 

Jose Antanas Serginskas

Hei Jose,
 

It's hard to judge your situation. But from what I read, my guess is that you use to little rudder. Look at the picture of the FCTM on page 7.3. I think what you are describing is displayed in the third picture from the left, am I right?

I did some engine failure takeoffs yesterday and for me it worked fine. It's all a matter of balancing the inputs right, I guess. I can try it once more and see what I do and how the plane behaves, respectively try to reconstruct your situation.

Hello Rafael,

 

Thanks for you reply.

 

I can maintain track after T.O. the problem is that I dont see the column going from displaced to level  as I apply the correct amount of rudder input and the wings are level (to test I crosscheck with track in navigation display).

 

Before I apply any rudder, the control wheel should be as in the second picture starting from the left (FCTM), to maintain wings level, after that I should apply, left foot, in this case to point the nose to track and arrive to the correct situation as in the first picture from the left.Then trim. The problem is that the control wheel is not moving from displaced to level as I apply the rudder.

 

The bottom line is that I should see the column go from displaced to level as I apply rudder ,to know when Im applying the correct amount, and I cant see it doing that.

 

Thank you very much.

Jose Antanas Serginskas

 

The problem is that the control wheel is not moving from displaced to level as I apply the rudder.


The bottom line is that I should see the column go from displaced to level as I apply rudder ,to know when Im applying the correct amount, and I cant see it doing that.

 

Is your Joystick/Yoke centered when you have applyed the rudder? Does this mean that your real-world joystick/yoke position and the one displayed in the cockpit disagree?

 

 

I can maintain track after T.O. the problem is that I dont see the column going from displaced to level as I apply the correct amount of rudder input and the wings are level (to test I crosscheck with track in navigation display).

 

How do you crosscheck with the track? Do you have by any chance sidewinds that would lead to differences in heading and track?

Is your Joystick/Yoke centered when you have applyed the rudder? Does this mean that your real-world joystick/yoke position and the one displayed in the cockpit disagree?

My RW yoke follows the movement of the one on the ngx, but of course it doesnt move by itself as in the real a/c.

 

 

How do you crosscheck with the track? Do you have by any chance sidewinds that would lead to differences in heading and track?

 

I just put the track line of the Nav Display matching the extended rwy centreline.Weather is all cleared.

Here is a video as it should happen.If you have time please just check from 05:09 to 05:20.

 

 

Thank you very much.

Jose Antanas Serginskas

I watched the video and I will give it another try this evening. Can you quick tell me how you put the rwy centerline on the Nav display? What is the corresponding CDU command?

I recorded the whole thing from yesterday. In case you are interested, here's the link (respectively video):

 

 

You can't really see the controls with the view I used. But I can tell you, that I had my yoke neutral during the initial climb.

I can't promise to give you a solution to this but I will definitely look into it.

 

cheers,

Rafael

I don't think tracking the runway centerline and being in coordinated flight are necessarily the same thing. You can track straight down the runway and be completely out of trim.

 

It's definitely harder in the sim with a non-force feedback stick to try to see and feel what's going on. It might be simpler to simply try to "center the ball." (Just out of center is best.)

I don't think tracking the runway centerline and being in coordinated flight are necessarily the same thing. You can track straight down the runway and be completely out of trim.

 

Of course not,youre right, ideally one should maintain the centreline and be coordinated, i.e., nose pointed along track. The problem is that for being coordinated I need to level the wheel  applying the correct input, thats the correct procedure and not looking at the "ball". But I think the ngx doesnt animate it or Im missing something.

Hi,

 

I am a little bit confused about the things I read here.

 

First, I am not sure that the yoke being displaced due to engine failure is simulated. However, I do know that yoke does respond to joystick input as well as MCP input (more specifically heading, altitude changes).

 

I noticed you crosscheck with navigation display. You should use the attitude

indicator instead as this will reveal roll or yaw tendencies (You can yaw left - or right - and still maintain a straight track hence that is what crabbing on final with crosswind is all about).

 

Note that the "ball" is represented by the lines under the arrow on the horizon indicator indicating the degrees of banking).

 

When an engine fails some effects come to play: the running engine provides power, the failed engine not. The running engine pushes the wing forward, therefore has more speed, creates more lift then the wing with the

failed engine:due to this the aircraft yaws into the direction of the failed engine and the wing with the running engine goes sligthly up.

 

The yaw effect must be neutralized by the rudder pushing it into the direction of working engine. Neutralise the yaw and you practically neutralise the banking of the wing (wing up).

 

The main concern here is that if you use yoke to compensate you start to bank reducing the lift. With using the rudder you rotate the aircraft in the horizontal plane and with wings level you get maximum lift (since you are not banking). And that is what you want when you loose power on an engine : get the maximum lift on a single engine to climb to safe altitude.

If you have found the correct rudder input you can trim the rudder because you don't want the pilot to end up with a cramp in his leg just before landing.

Hi Spidierox. Thanks for your reply.

 

 

First, I am not sure that the yoke being displaced due to engine failure is simulated.

 

Thats exactly my question.

 

For example, imagine that you have an engine failure, and after you trim the pitch you engage a/p and dont apply enough rudder input (but still can engage a/p). What happens in ngx is that the wheel is ALREADY level and not displaced as it should be. In this scenario the wheel should be displaced and as you apply correct rudder input, or rudder trim, it should go from displaced to level, but that doesnt happen in ngx.

 

Thank you very much.

 

José Antanas Serginskas

 

 

I did to trials yesterday evening again. Everything worked fine and as I expected it. I was simulating a engine 2  (right engine) failure at takeoff shortly after V1:

1. After engine failure and takeoff the plane rolled and yawed to the right side.
2. I moved my yoke to the left to counteract the roll and to keep the wings level. That left me in a slip to the left.
3. I introduced left rudder to counteract the yaw and to get the flight coordinated again.

4. I balanced my rudder input such that my yoke was centered during a wings level coordinated flight.
5. I trimmed the rudder to release the pressure from the rudder pedals (which is actually not that easy in the simulator due to the lack of real forces on the pedals).

6. Finally I had the plane in a well coordinated flight with yoke centered and wings level.

So for me it worked and I think that I did everything as described in the FCTM page 7.2. But maybe I did not understand your question right in the first place.

Could you be so kind and describe once more what you do, what you see and what you expect to see?

Love the videos keep it up.

Could it be a sim setting for auto yaw damp?