Cockpit

* User Profile

Welcome, Guest. Please login or register.

Login with username, password and session length

Who's Online

  • *Users: 5
  • *Guests: 60
  • *Total: 65

FlightSimExpo 2018

Author Topic: PM AT issues found and solution ( throttle hunting and overspeed )  (Read 958 times)

Offline GSalden

  • Forum GURU
  • *
  • Posts: 45
  • Karma: +0/-0
  • Aviation Enthusiast
  • First Name: Gerard
  • Home Location: Gorinchem
For years now people are suffering from issues with the PM AT below 11.000ft : speed 10-15 kmnots too high and throttle hunting .
For 3 weeks I have worked on a customized flightmodel. Perfet landing with flare manually but not with Autolanding.

If I wanted to do an Autolanding I had to set the mcp speed 15 knots lower than the matching flaps speeds.
Below 500 ft I set the final flap with Vref - 5 instead of Vref + 5 and the landing then went very smooth. 
 
Bernhard here at Cockpitbuilders found that weather had a great influence on the AT at approach.
If he turned of his weather engine he could make a good autolanding and the aircraft kept the dialed speed instead of throttle hunting and speeds that stayed 10-15 knots above the dialed mcp speed.

I have been testing this too :
•Turbulence Off in the FSX/ P3D menu and no weather engine --> no heavy throttle hunting and the AT keeps the dialed mcp speed
•Weather engine On and throttle hunting occurs 


Solution for now :
•In ASN / Opus :  all turbulence Off ( wind, cloud, wake )
•In Fs  Turbulence Off
•FSX.cfg/P3D.cfg : Turbulence values have to be set to 50% their default value
•In Fsuipc :  surpress guts/windshear/turbulence

These are the same adjustments that were advised just after the release of the PMDG 737 ( S-tuning/up/down pitching at approach ).
Later they made changes to their mcp gauge.

PM never had the issue in Fs2004. Probably as weather injecting was still very basic.
When FSX came out many people had these issues.

Imho PM has turned off turbulence in their simulator as in all flying vids the aircraft never suffers form turbulence.
They probably never thought about the turbulence which other people had set to high values....


The default PM 737-800 does not work correct on my system : overspeed on descent and not the right "737"feeling according to my judgement. I made some adjustments to my custom made airfile regarding drag/lift and now I can make nice Autolandings.
When making a flight I will land manually , but for me everything has to work when if the feature exists.

The last thing I have to do is look into the throttles retard as that does not happen correctly.
With only the onscreen throttles the throttles go back to idle slowly after landing.
When using my motorized Cockpitsonic tq they do not go back to idle at all.

If anyone has the solution for this let me know.
If that has been fixed  too I will upload the total PM 737-800 package for download.

Regards,
Gerard 
« Last Edit: December 04, 2015, 01:51:13 PM by GSalden »

Offline jr2mey

  • Forum GURU
  • *
  • Posts: 93
  • Karma: +0/-0
  • Aviation Enthusiast
  • First Name: James
  • Home Location: Tacoma
Re: PM AT issues found and solution ( throttle hunting and overspeed )
« Reply #1 on: August 23, 2017, 11:56:45 AM »
Hello Gerard,

I was wondering if you managed to solve your 737 config issues.  I too use PM with their 737 flight model and have always been experiencing the same issues.

Regards,
James

James

Offline Bob Reed

  • Administrator
  • I am chained to this website!
  • *
  • Posts: 2,259
  • Karma: +10/-0
  • Bob the Builder!
  • First Name: Bob
  • Home Location: Holley, New York
Re: PM AT issues found and solution ( throttle hunting and overspeed )
« Reply #2 on: August 23, 2017, 12:22:17 PM »
I too would be interacted in this as I use PM.

Offline Patt737

  • Forum GURU
  • *
  • Posts: 21
  • Karma: +0/-0
  • Aviation Enthusiast
  • First Name: Patrick
  • Home Location: Issoire
Re: PM AT issues found and solution ( throttle hunting and overspeed )
« Reply #3 on: February 01, 2018, 02:00:14 PM »
Hello everyone,

We have been experiencing the same problem since we started p3d v3.
It worked well with the fs9 autopilot.

Can you tell us what are the drag / lift values you have changed.

What new values did you give?

Thank you .

Patt.

Offline Bob Reed

  • Administrator
  • I am chained to this website!
  • *
  • Posts: 2,259
  • Karma: +10/-0
  • Bob the Builder!
  • First Name: Bob
  • Home Location: Holley, New York
Re: PM AT issues found and solution ( throttle hunting and overspeed )
« Reply #4 on: February 05, 2018, 08:26:29 AM »
Hello everyone,

We have been experiencing the same problem since we started p3d v3.
It worked well with the fs9 autopilot.

Can you tell us what are the drag / lift values you have changed.

What new values did you give?

Thank you .

Patt.

Mr Saldon has not been on the board since Nov 19th 2016. I do not think there will be an answer from him. :) Anyone else have an answer?
« Last Edit: February 05, 2018, 08:27:06 AM by Bob Reed »

Offline Patt737

  • Forum GURU
  • *
  • Posts: 21
  • Karma: +0/-0
  • Aviation Enthusiast
  • First Name: Patrick
  • Home Location: Issoire
Re: PM AT issues found and solution ( throttle hunting and overspeed )
« Reply #5 on: February 06, 2018, 01:39:36 PM »
Hello,
Thank you for help.
I suspected, but I tried.
I'm going to open another post because I have another question.

Patt

 

COUNTDOWN TO WF2018


WORLDFLIGHT TEAM USA

Will Depart in...

Recent Posts

Projectors or 4K Monitors?
by XOrionFE
[Today at 10:03:32 AM]
Just about complete!
by Mach7
[Today at 09:44:38 AM]
New Compass for King Air
by _alioth_
[Today at 03:56:44 AM]
What have you done for your simulator today?
by RayS
[Today at 12:20:36 AM]
Pedestal blanks / Fillers
by Atomic_Sheep
[February 19, 2018, 10:47:19 PM]
FSUIPC
by N606DL
[February 19, 2018, 06:57:04 PM]
Garmin G5 PFD
by pilotshane
[February 19, 2018, 05:53:16 PM]
Looking for this book!
by pilotshane
[February 19, 2018, 05:39:43 PM]
Visuals upgrade - inspiration needed
by Ed
[February 19, 2018, 05:04:09 PM]
Flight1 King Air 350i Modified Aircraft.cfg
by Trevor Hale
[February 19, 2018, 04:57:02 PM]
737-800 Arduino X-Plane Build
by kurt-olsson
[February 19, 2018, 04:33:10 PM]
My 737 Desktop Cockpit
by Nolatron
[February 19, 2018, 11:46:04 AM]
Marking wires
by Ed
[February 19, 2018, 09:44:25 AM]
Fitting Forward Overhead Frame
by jackpilot
[February 19, 2018, 08:21:11 AM]
One Giant Step for mankind....backwards!
by Atomic_Sheep
[February 19, 2018, 07:58:29 AM]
Join me on Vatsim Tonight
by Bob Reed
[February 18, 2018, 05:55:23 PM]
MESH HELP
by Trevor Hale
[February 18, 2018, 03:10:35 PM]
Wanted: Real Boeing 737 TQ
by Steenos
[February 17, 2018, 09:39:13 PM]
FlightSimExpo - June 9 - 10 2018
by James twomey
[February 17, 2018, 08:30:35 PM]
Well.... There is half! lol
by Trevor Hale
[February 17, 2018, 11:15:35 AM]
Post Your Pit!!!! 1000 Member Show and Tell
by Bob Reed
[February 16, 2018, 02:50:05 PM]
Attention All Members and Guests
by Trevor Hale
[February 16, 2018, 11:47:59 AM]
Hispa help....please
by Bob Reed
[February 16, 2018, 08:42:10 AM]
Real Switch Amps
by Atomic_Sheep
[February 16, 2018, 04:40:54 AM]
REAL 737 TQ SORRY JUST SOLD!!!
by Trevor Hale
[February 15, 2018, 02:00:26 PM]
Aircraft config and question
by Patt737
[February 15, 2018, 01:46:34 PM]
B767 MIP
by kurt-olsson
[February 15, 2018, 11:14:07 AM]