Hi!

 

I have one Problem with the thrust of the pmdg 777 and i think it is not normal.

ex.: I'm approaching with IAS 140kts, 2° pitch and -800fpm V/S - there is a warning tone and it says "Air Speed Low", a yellow square is around the IAS airspeed and there is already this red Thing next to the Speed, which means, I'm too slow.

If i now increase Speed to 155kts, the Alarm tone disappears and the red Thing also, but know I can't descend that quick anymore, because I'm too fast, although the airplane says, it is the slowest possible Speed: 155kts; -600fpm, -3° pitch... Looks absolutely unprofessional and can't be normal.

Another Thing: If my airspeed is to low (although it actually is not in my opinion), i cant really pull up the airplane anymore, i can not increase the angle anymore.. So if i'm on Approach and my airspeed is to low, i simply Impact the ground, although i'm far away from a stall: 150kts, -3° pitch and -1000fpm. As soon as i reach a normal Speed, the 777 suddenly pulls up and i can steer it normally again... It is almost impossible to land it. Is it a bug or do i do something wrong?

 

Thank you!

What is your flaps setting? Wind conditions? Landing weight? All important variables before answering your questions.

I'm guessing the FMC has either no information about weight, or the wrong information about weight.

Flaps full, winds 0, fuel 30000kg, i didnt change anything at the payload settings etc... I don't know the total weight.

 

I changed the fuel in the FMC via Fs Settings->Fuel... Do I have to give the fmc any more information?

Well that's a problem right there if you don't know total weight seeing as how your approach speeds and the red bar on the speed tape are based on weight. Click on the init ref button on the fmc while in flight. It will show current weight with appropriate speeds for a given flap setting

Flaps full, winds 0, fuel 30000kg, i didnt change anything at the payload settings etc... I don't know the total weight.

 

I changed the fuel in the FMC via Fs Settings->Fuel... Do I have to give the fmc any more information?

 

FMC needs zero fuel weight, otherwise it assumes the worst case scenario (ie totally maximum people sitting on each others laps and doors bursting at the seams full)

 

INIT ref page > PERF section. You can 'just right click" and then left click for the actual weight to be entered here. 

You haven't mentioned deploying your flaps. Are you doing so appropriately?

Cheers, Richard

It's not a bug, you are doing something wrong. Approach at Vref+5 and you will be fine. Anything less than Vref is too low an airspeed for the weight. Even if you think otherwise.

 

Also on an approach you wouldn't normally have -3 deg pitch. That implies zero angle of attack. Pitch angle should be about 2 deg nose up.

 

 

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Also no mention of gross weight & Landing weight.  The negative pitch may also suggest the OP is using the FS menu to load the aircraft.  Maybe just selecting max fuel and cargo and screwing up the CG?

thank you! I could find the Problem and now it works...

 

Does the pmdg 777 have an Head-Up Display like the NGX?

 

And how should i disconnect the Autopilot? because if i click (right click or left click) on the AP button when it is activated, nothing happens.. Then i push down the button "AP disengage", it is disconnected after that but there is a warning tone and doesn't look and Sound like Im doing it right

thank you! I could find the Problem and now it works...

 

Does the pmdg 777 have an Head-Up Display like the NGX?

 

And how should i disconnect the Autopilot? because if i click (right click or left click) on the AP button when it is activated, nothing happens.. Then i push down the button "AP disengage", it is disconnected after that but there is a warning tone and doesn't look and Sound like Im doing it right

Need to click on the AP disengage button again to silence the autopilot disconnect alarm.

Does the pmdg 777 have an Head-Up Display like the NGX?

 

 

No, because the real one doesn't have it as a factory option either. FedEx has them on their 777f, but they are an aftermarket installation.

 

 

Sent from my iPad using Tapatalk

is it possible that i have a warning tone because the AP is disconnected, but the APP is still acitvated? I can not deactive the APP by right or left click... But i can fly the plane, the AP isnt following the ILS anymore.

APP is a Flight Director mode, not an Autopilot mode. (LAND III is an autopilot mode that follows the Flight Director's APP mode).

 

Of course if the Autopilot is switched off, it won't follow anything.

 

If you want to cancel the APP mode, you will need to either hit the Go Around button (same as TOGA/takeoff thrust) or turn both flight directors off to reset them. (Both have to be off at the same time, leaving no FMA modes active)

 

This is normal behaviour of the real life system in not just the 777, but also the 737, 747, 767 etc*.

 

There is (in our FS world) several ways of disconnecting the autopilot and then silencing the warning horn.

I have listed them here:

http://forum.avsim.net/topic/433388-autopilot-alarm/#entry2915680

 

*etc includes 757, MD80, MD90, B717-200, MD11, RJ100, RJ85 and more. A320/330/340 are slightly different.

 

 

Then i push down the button "AP disengage", it is disconnected after that but there is a warning tone and doesn't look and Sound like Im doing it right

Need to click on the AP disengage button again to silence the autopilot disconnect alarm.

is it possible that i have a warning tone because the AP is disconnected, but the APP is still acitvated? I can not deactive the APP by right or left click... But i can fly the plane, the AP isnt following the ILS anymore.

 

It seems to me you are going the wrong way about it.

 

The autopilot disengage bar is not for normal use, rather for non-normals (say, you proper disconnect buttons don't work).

The proper way to turn the AP off is to use a yoke button. That we don't have, so PMDG gave us a couple options, map the disconnect button to a key combination via CDU, or use a hidden clickspot on the MCP (both are documented in intro manual). Once you get the AP disconnect button set up, you will have to press it, wait about 1.5-2 seconds and then press it again to silence the warning. That is the same as in real life, apparently in case someone happened to press the disengage button twice really fast by some error (that can happen if you reflexively grab the yoke in the wrong place for example)