autotrim issue 1.10

[Cmbaviator 8]

Hi

For my summer Job, I went to Aviasim ( Lyon) for a work experience, this company is specialised in A320 simulator for public, so I get lucky as i was able to speak to real Airbus pilot.

I noticed 2 wrong behaviour of the autotrim: ( confirmed by real pilots )

* when the aircraft starts to turn and the bank angle is within +- 33°, the current altitude or current Vertical speed before the turn should be conserved.

Exemples :

- during climb, current vertical speed is + 2000, the pilot turn left ( BA 20 °) the vertical speed should remain at +2000, in AXE, the VS would drop to +1700 or +1600.

- current altitude + 3000 feets, the aircraft turns ( BA 25° ) the altitude should be maintained. this is not the case in axe.

* No autotrim nor not efficient enough when changing configuration.

Examples :

glide scope captured: current config : flaps 1 , current VS : -700, when going to flaps 2 ( config 2) the auto trim should maintained the current VS, but in Axe same thing as above, the VS will increase due to the increase of the lift.

Will this be fixed ?

Regards

CMB

[Cheyenne Chief Pilot 829]

Regarding your 2nd example (G/S):

When G/S captured, the G/S has to be maintained by the autopilot. With flaps being lowered, managed speed is reduced, which results in a smaller V/S to stay on the glideslope.

What I notice, when lowering flaps on the G/S, is, that lift increases with the AAX momentarily moving slightly above the G/S. The autopilot corrects this by increasing V/S a bit. This looks like normal 'behaviour' to me.

[Cmbaviator 8]

I mean with out autopilot but only manual flying, i'll post a video soon

[Cmbaviator 8]

[Joshua Che. 1601]

Hi,

Firstly, please avoid telling me you have real world pilot friends that say its wrong..... If your real pilots think its wrong, they will come and PERSONALLY tell me about it in their own words, not yours. Read this: http://forum.aerosoft.com/index.php?/topic/64822-i-think-theres-a-bug-but-the-developers-dont-believe-so/

Second, read this:


Hand Flying in Normal Law holds pitch/gload. NOT VS. This is a common misconception that I have seen many times over and over again. I will put up a FAQ for this. What you asked your pilot friend about is probably because he thought you are on AP.

[Cmbaviator 8]

First off all, the pilots i've talked to didn't critize your product, i've only talked to them about the two sentenced (in bold ) above, maybe he didn't understand me for the first sentence. After reading the FCOM regarding flight control, you seem to be right and I apologize for the inconvenient.

But when changing speed or configuration, the autotrim should work and i think that this is not working in v1.10 ( see video above ) but i might be wrong.

[Joshua Che. 1601]

First off all, the pilots i've talked to didn't critize your product, i've only talked to them about the two sentenced (in bold ) above, maybe he didn't understand me for the first sentence. After reading the FCOM regarding flight control, you seem to be right and I apologize for the inconvenient.

But when changing speed or configuration, the autotrim should work and i think that this is not working in v1.10 ( see video above ) but i might be wrong.

Cmbaviator,

I am not angry or anything like that, but let me quote the exact statement that I strongly disapprove of.

noticed 2 wrong behaviour of the autotrim: ( confirmed by real pilots )

This statement clearly shows that your RL Pilot friends confirm bugs in the auto trim. Like I said read this: http://forum.aerosoft.com/index.php?/topic/64822-i-think-theres-a-bug-but-the-developers-dont-believe-so/

I simply see no point in using real world pilots to "enhance your claim". You report a bug you think its wrong, you provide sufficient evidence, and I will check it, but pilot friends are NOT evidence.

Now, back to the topic, in your video, its hard to tell anything as there is pilot inputs. I just exited FSX flying by hand and the FBW holds the pitch within a 2 deg pitch tolerance regardless of speed. For change of configuration, there is a slight pitch up moment when extending flaps (but its hard to notice) and its present in real life as well.

[Cmbaviator 8]

what I exactly mean , is for example :

AP off

current VS :-1000

current seped : at dot point ( approach mode activated ).

pilot select flaps 1 => speed dropping to S dot, will the autotrim works to maintain the current VS before the change of speed and configuration ?

Regarding the part of fcom you send me, : the pilot does not have to trim for speed and configuration change.

Anyway, will make a better video this evening.

[Joshua Che. 1601]

what I exactly mean , is for example :

AP off

current VS :-1000

current seped : at dot point ( approach mode activated ).

pilot select flaps 1 => speed dropping to S dot, will the autotrim works to maintain the current VS before the change of speed and configuration ?

Regarding the part of fcom you send me, : the pilot does not have to trim for speed and configuration change.

Anyway, will make a better video this evening.

Hi,

Please reread my eariler post. The FBW holds Pitch/Gload. Vertical Speed is not Gload or Pitch.

[--- 170]

Autotrim definitely works with the AAX.

FYI the FBW in reality only maintains 1g.

The Aerosoft A320 maintains pitch which isn't correct.

The BBS A320 maintains the current flight path / v/s which isn't correct either.

FSL claims to simulate the FBW correct (1g incl C* law) but as it's not available yet it's just a claim.

So far the AAX has definitely the better feel and the closer FBW simulation than the BBS A320.

[sp85 0]

# Post deleted. My mix up ...