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LUA dynamic frictions!

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What is this? Has anyone done this mod? Just found it out recently why didn't PMDG fix this issue?

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What is this? Has anyone done this mod? Just found it out recently why didn't PMDG fix this issue?

 

I use it and think it is fantastic. It allows for realistic single engine taxi procedures which the FS2Crew Reboot is going to support out of the box. 

 

It is my understanding that it just makes the known friction issues in FSX to be more realistic. You no longer have to unrealistically fight the airplane while on one engine.

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Nice! What actions did you do to get it running? If you don't mind :D

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LUA script is for FSUIPC registered users.

To patch friction u have to add line 'PatchSIM1friction=Yes' to [General] section of FSUIPC.ini file

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LUA script is for FSUIPC registered users.

To patch friction u have to add line 'PatchSIM1friction=Yes' to [General] section of FSUIPC.ini file

 

No, you use either the PatchSim1friction option *or* the dynamicfriction LUA script.  The patch option changes the table globally for all planes and under all conditions.  The LUA script changes the coefficients only at low speeds so that taxi behavior is more realistic, and keeps the side-friction coefficients at all times to improve steering behavior.  If you want the finer control of the Dynamic Friction LUA script you do not use the PatchSim1Friction option.

 

Regards

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dynamicfriction LUA script -  i placed this file in modules, but i read you delete some entries within this file ?

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No, you use either the PatchSim1friction option *or* the dynamicfriction LUA script. The patch option changes the table globally for all planes and under all conditions. The LUA script changes the coefficients only at low speeds so that taxi behavior is more realistic, and keeps the side-friction coefficients at all times to improve steering behavior. If you want the finer control of the Dynamic Friction LUA script you do not use the PatchSim1Friction option.

 

Regards

What Bob said is correct. I believe it only affects friction below 25 knots. You copy and paste it in the modules folder and add the dynamic friction line to the text file.

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You copy and paste it in the modules folder

 

so your not removing anything from inside that file ?

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so your not removing anything from inside that file ?

 

No!  It was written up by a FSUIPC user and sent to Pete who included in a bundle.  You can tweak it or remove what you want, but it's pretty well good as it is.

 

Like Bob mentioned, you must use only one Friction LUA file.  I use the dynamic file as it does not affect aircraft once you get over 30kts...it only works during taxi and does not affect takeoff run that has been programmed by the developer.

 

To get it running, put the "DynamicFriction.lua" in your modules folder.

 

In your FSUIPC.ini file, add the lines:

 

[Auto]

1= Lua DynamicFriction

 

 

This will start the LUA script once FSUIPC initializes.

 

That's it.  Easy Peasy.

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Ok i done that. But at max GW i just need to touch my levers and the acft taxis quite quick? That cant be right?

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Mine doesn't do that.  When I'm at max GW, the NGX just sits there at idle.  I need about 31-32% N1 to get moving and small blips of power to keep moving.  At low GW, once I'm rolling, it keeps rolling at idle power.

 

Are you using the DynamicFriction.lua file included with FSUIPC?

 

Is PatchSim1friction off (or not present) in your FSUIPC.ini (Both can't run together)

 

Other than that, you can play with the friction co-efficients to get them to suit your needs. (I have no experience in this.  Sorry).

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It seems with me it takes about 24-26 to get moving. I will test again tonight and see but i'm positive it doesn't take 31 32 like yours.

 

However if i delete wheel rolling in that module its fine it takes alot more power to get it moving

Yeh i'm using that file

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It seems with me it takes about 24-26 to get moving. I will test again tonight and see but i'm positive it doesn't take 31 32 like yours.

 

However if i delete wheel rolling in that module its fine it takes alot more power to get it moving

Yeh i'm using that file

Could i ask for a copy or a peek at your files? been trying to get the friction right with the ngx but she starts moving way too fast for being so heavy. As I experienced in the real NG (In cockpit) you will need at least 30-35% to get get rolling and nearly 40-42% to pick up speed relatively fast

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Could i ask for a copy or a peek at your files? been trying to get the friction right with the ngx but she starts moving way too fast for being so heavy. As I experienced in the real NG (In cockpit) you will need at least 30-35% to get get rolling and nearly 40-42% to pick up speed relatively fast

 

Same boat as you. Starts rolling about 24 when fully loaded. I'm on holiday just now will send my file on sunday.

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Same boat as you. Starts rolling about 24 when fully loaded. I'm on holiday just now will send my file on sunday.

I find it very strange for a such heavy aircraft to start roll at a n1 of 24%, if u ever find a solution let me know. Enjoy your Holiday!  :smile:

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I actually had the script and found the 777 taxied on idle, which is unrealistic. I deleted the script and the taxiing seems normal in the 777.

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Me too maybe its a FSX limitation.

 

Thanks!

The whole thing is a bug in FSX. They either used incorrect friction numbers or entered the data incorrectly and didn't test it. The patch fixes this rather well. The problem arises because PMDG also adjusted their model to overcome the friction problem. Part of which is a higher thrust at low speeds. So now you have correct, reduced, friction but with excess thrust. Probably best to disable the friction fix when using PMDG sims. It's a shame as the friction fix also improves contaminated runway simulation, something the thrust increase cannot do.

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Microsoft were terrible at making FSX full stop!

 

So kevin, you think i should get rid of FSUIPC entrys altogether then?

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Microsoft were terrible at making FSX full stop!

They got a great deal right, but sadly a few key things very wrong, this being one of them.

 

So kevin, you think i should get rid of FSUIPC entrys altogether then?

Not completely because they may be more applicable to other addons. But if you only use the NGX then you probably don't need them active, in dry conditions at least.

 

That being said, I have used the default (non-LUA) FSUIPC friction adjustment with no problems with PMDG sims. You might want to try that rather than the dynamic LUA version. My opinion is that if you can use the friction mod then it's best to do so. If it's giving you trouble then disable it.

 

The other thing would be to check that you don't have both the default FSUIPC adjustment and the dynamic LUA adjustment active in the INI file at the same time. As stressed by Bob Scott in post #6. This will make things worse.

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Thanks for the input kevin. I only use the PMDG 737NGX. So i should get rid of the Dynamic LUA and try the default? But what is exactly the defauly entry?

 

Can't mind from the top of my head with using PMDG friction, but does it take more than 24 N1 to get her moving at max GW?

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Thanks for the input kevin. I only use the PMDG 737NGX. So i should get rid of the Dynamic LUA and try the default? But what is exactly the defauly entry?

 

Can't mind from the top of my head with using PMDG friction, but does it take more than 24 N1 to get her moving at max GW?

As stated earlier in the thread add line 'PatchSIM1friction=Yes' to [General] section of FSUIPC.ini file. Disable the LUA mod first.

 

I can't remember. Best to do a before and after test for yourself to compare the effect.

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